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Known Faults Database

Mercedes-Benz S-Class problems, reliability and years to avoid

If you are considering buying a used Mercedes-Benz S-Class, these are the common problems worth knowing about first. Our garage database tracks 6 known faults for this model, 2 of them rated high severity. Every one below is a repair bill a seller has good reason not to mention.

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Is the Mercedes-Benz S-Class reliable?

The Mercedes-Benz S-Class has 6 known faults in our database across 4 generations, 2 of them rated high severity. The most serious are suspension (air suspension compressor failure, relay failure) and fuel system (premature injector failure and failure of injector 'fire seals' are common). None of them makes the car a bad buy on its own; the risk is a seller who knows and says nothing.

That is a count of the faults we hold, not a reliability score. Popular cars get written about more, and a newer generation has had less time to show its faults.

Which Mercedes-Benz S-Class years should you avoid?

No year is a write-off on its own. What matters is which serious faults a given year and engine can have, and whether the car in front of you has had them fixed.

W220, 1998 to 20052 high severity
5 known faults, the serious ones in the suspension, fuel system
W221, 2005 to 2013
1 known fault, none rated high severity
W222, 2013 to 2020
No faults on record yet
W223, 2020 on
No faults on record yet

Years and engines with a serious known fault

  • 1999 to 2011, All with Airmatic: air suspension compressor failure, relay failure
  • 1995 to 2005, Straight 6 3.2 CDI: premature injector failure and failure of injector 'fire seals' are common

Each one is set out in full below, with the symptoms, the typical mileage and a rough repair cost.

Generation 1 of 35 known faults · 4 good notes

Mercedes-Benz S-Class W220 (1998 to 2005) problems

SuspensionHigh severity📝 Editorial

Air suspension compressor failure, relay failure, or leaking air struts causing the car to collapse

Rough guide
£800-2500

Typical symptoms

  • car sitting very low over the wheels
  • red 'AIRMATIC Visit Workshop' warning on dash
  • compressor running constantly

Affected vehicles

Engines:
All with Airmatic
Typical mileage:
80000-120000 miles
1 more owner report backs this up
  • June 2012The rear air suspension is highly prone to collapsing, with repair costs often exceeding the car's value.
🔍 We have a specific pre-purchase check for this faultCheck an advert →
Fuel SystemHigh severity📝 Editorial

Premature injector failure and failure of injector 'fire seals' are common. Failed seals allow soot and carbon to 'weld' injectors into the cylinder head, known as 'black death', making removal difficult and potentially requiring cylinder head replacement.

Rough guide
£500-4000+

Typical symptoms

  • Smell of neat fuel (paraffin-like) in the cabin
  • Chuffing sound from the top of the engine
  • Engine running rough or misfiring
  • Visible carbon build-up around injectors

Affected vehicles

Engines:
Straight 6 3.2 CDI
Typical mileage:
60000-100000 miles
🔍 We have a specific pre-purchase check for this faultCheck an advert →
ElectricalMedium severity📝 Editorial

On the 1999 to 2005 S-Class, the drains on each side of the fresh-air intake well beneath the windscreen clog with leaves and debris. Rainwater then spills into the car, soaking the front carpets, the heater blower and the wiring, which can short out and sometimes needs a whole new loom. A recall replaced the blower regulator on cars built January to May 2000 for this reason; check it was done (GOV.UK recall checker).

Typical symptoms

  • damp or wet front footwell carpets
  • heater blower stops working or misbehaves
  • electrical faults that appear after heavy rain

Affected vehicles

Engines:
All engines
Typical mileage:
unknown miles
🔍 We have a specific pre-purchase check for this faultCheck an advert →
Bodywork/ChassisMedium severity📝 Editorial

Rust is a serious weakness of the 1999 to 2005 S-Class: left untreated, the rear wheel arches and door bottoms rot through. From the fifth year, the Mercedes 30-year perforation warranty only paid out if a Mercedes dealer had serviced the car in the two years before the repair, and by 2009 Mercedes was turning down claims for rusty bodies and bubbling paint.

Typical symptoms

  • bubbling paint on the wheel arches and door edges
  • holes in the rear arches or door bottoms

Affected vehicles

Engines:
All engines
Typical mileage:
unknown miles
🔍 We have a specific pre-purchase check for this faultCheck an advert →
SecurityMedium severity📝 Editorial

The locking system on the 1999 to 2005 S-Class is prone to failing. The fix can be a new electronic ignition switch (EIS) control unit, typically about £513 including labour and VAT.

Rough guide
£513

Typical symptoms

  • central locking stops responding
  • remote key fails to lock or unlock the car

Affected vehicles

Engines:
All engines
Typical mileage:
unknown miles
🔍 We have a specific pre-purchase check for this faultCheck an advert →

What owners like about the W220

4 notes
  • The galvanised body comes with a 30-year warranty, and the car includes 30 years of roadside assistance.
  • These S-Class models are described as attractive, well-constructed, and unaggressively styled large vehicles.
  • Rack and pinion steering provides good road feel, enhancing the driving experience without compromising ride comfort.
  • This S-Class excels as a quiet and refined cruiser, ideal for high-speed motorway journeys.
End of the W220 section.Pick another year ↑Check a Mercedes-Benz S-Class advert →
Generation 2 of 31 known fault · 6 owner reports · 7 good notes

Mercedes-Benz S-Class W221 (2005 to 2013) problems

Transmission/ClutchMedium severity📝 Editorial

7G-Tronic conductor plate (electrohydraulic control unit) speed sensor failure

Rough guide
£500-1200

Typical symptoms

  • gearbox stuck in one gear (limp mode)
  • harsh downshifts or flaring between gears
  • loss of drive

Affected vehicles

Engines:
7G-Tronic automatic (722.9 gearbox)
Typical mileage:
60000-100000 miles
🔍 We have a specific pre-purchase check for this faultCheck an advert →

What owners report on the W221

6 single reports, unconfirmed

One owner each, in their own words rewritten as a line, and not counted in our risk scoring. A fault joins the list above once a second report or an editorial source backs it.

  • Suspension and steering · September 2018A 2006 S600 with 117,000 miles faced non-availability of a replacement front left ABC strut.
  • Gearbox and clutch · September 2017A 2006 S320CDI at 120,000 miles experienced automatic transmission failure, with the engine revving and no gear engagement.
  • Bodywork · April 2017A 2008 S320 required three new doors and a wing due to significant rust development.
  • Electrics · February 2017A 2013 S350 at 18,500 miles entered limp mode with an engine light, indicating a P220101 NOx sensor electrical problem.
  • Gearbox and clutch · July 2016A 2007 S320CDI developed erratic gearchanges and reverse failure; after reconditioning, the issue returned, pointing to the TCU.
  • Brakes · May 2013The parking brake operation is not intuitive, leading to accidents when new owners are not properly informed.

What owners like about the W221

7 notes
  • May 2011A 1985 560SEC felt like a new car, demonstrating smooth, quick, and unruffled performance, a testament to its excellent build quality.
  • The S-Class is described as good looking and solidly built, appearing to be carved from a single block.
  • This model demonstrated an extremely low death rate from crashes, with only 1 out of 9 points.
  • The S-Class offers a wonderfully luxurious and comfortable cabin experience for occupants.
  • The interior of this S-Class model features a high-class design and premium materials.
  • This S-Class provides superb refinement and a quiet ride when travelling on the road.
  • This model is considered the best-looking saloon of its size, with an elegant design.
End of the W221 section.Pick another year ↑Check a Mercedes-Benz S-Class advert →
Generation 3 of 30 known faults · 4 owner reports · 13 good notes

Mercedes-Benz S-Class W222 (2013 to 2020): owner reports

What owners report on the W222

4 single reports, unconfirmed

One owner each, in their own words rewritten as a line, and not counted in our risk scoring. A fault joins the list above once a second report or an editorial source backs it.

  • Electrics · June 2019A December 2018 S350D at 1,800 miles experienced violent acceleration from traffic lights, possibly due to an accelerator pedal potentiometer.
  • Electrics · February 2019A 2017 S350 diesel at 7,000 miles continually lost its standard DAB radio signal for minutes at a time.
  • Gearbox and clutch · November 2018A new S500e with 4,000 miles developed clunking and vibration from the rear transmission when switching from battery to engine power.
  • Suspension and steering · March 2017A S350 Bluetech required a new steering rack under warranty to fix a squelching sound from the front wheels during turns.

What owners like about the W222

13 notes
  • The S-Class Coupe is renowned as one of the most comfortable cars available for travel.
  • This model offers genuine four-seater capacity, providing practical space for all occupants.
  • The S-Class Coupe features a useable boot, providing practical storage space for luggage.
  • The entry-level V8 engine in this model delivers reasonable fuel economy for its class.
  • The S-Class offers exceptional ride comfort, with this generation elevating the experience to an outstanding level.
  • Most engines in the range deliver excellent performance, coupled with impressive economy and low CO2 emissions.
  • The S-Class exhibits restrained elegance, complemented by a wonderfully fluent ride quality.
  • Despite its large size, the S-Class handles surprisingly well through corners, offering good driving dynamics.
  • Ride comfort is top-notch, with Magic Body Control making this Mercedes the smoothest riding luxury car available.
  • This S-Class Cabriolet is extremely quiet, comfortable, and quick, embodying true luxury.
  • The interior of this model is described as very tasteful and constructed with high-quality materials.
  • The S-Class Cabriolet is extensively equipped with advanced safety and comfort technology features.
  • The S 500 model features one of the great V8 engines, offering impressive performance.
End of the W222 section.Pick another year ↑Check a Mercedes-Benz S-Class advert →

Sellers rarely admit these faults outright

We track 18 specific phrases sellers use in adverts to soft-pedal these exact issues. Paste any Mercedes-Benz S-Class advert and we check it in seconds.

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Mercedes-Benz S-Class recalls

Recall work is done by the manufacturer, and GOV.UK says you will not usually have to pay for it. These are the 78 DVSA recalls for the S-Class, newest first. They do not tell you whether this particular car has had the work: for that, put the registration into the free GOV.UK MOT history check, which shows a recall status where the manufacturer shares it, or ask a franchised dealer to check the VIN.

🏛️ June 2026Cars built June 2025 to June 2025

SRPC2604 - Windshield bonding

Mercedes-Benz AG has determined that on certain S-Class (223 platform) and EQS (297 platform) vehicles the bonding of the windshield might not meet specifications.

Put right by: As a remedy Mercedes-Benz AG via its Mercedes-Benz service partners will replace the windshield.

DVSA R/2026/1912 vehicles affected in the UK
🏛️ April 2025Cars built September 2022 to January 2025

SRPC2501 - Processor Starter/Generator

Mercedes-Benz has determined that on certain AMG GT Coupe (192 platform)S-Class (223 platform) SL (232 platform) GLC (254 platform) and AMG GT 4-doorsCoupe (290 platform) vehicles with hybrid powertrain the processor of the control unit of the high-voltage starter generator might experience sporadic overload.

Put right by: As a remedy Mercedes-Benz AG via its Mercedes-Benz service partners will update the software of the high-voltage starter generator on the affected vehicles.

DVSA R/2025/12446 vehicles affected in the UK
🏛️ March 2024Cars built February 2023 to September 2023

SRPC2401 - System protection

On certain vehicles some 80A fuses installed might not meet requirements.

Put right by: Replace the respective main fuse boxes on the affected vehicles.

DVSA R/2024/130319 vehicles affected in the UK
🏛️ February 2024Cars built May 2014 to March 2017

On affected vehicles the panel located between the windshield and the panoramic sunroof might not have been bonded correctly during a prior service repair.

On affected vehicles the panel located between the windshield and the panoramic sunroof might not have been bonded correctly during a prior service repair.

Put right by: Check the front fixed element of the panoramic sliding sunroof and replace if necessary.

DVSA R/2024/02445 vehicles affected in the UK
🏛️ October 2023Cars built August 2020 to March 2023

A 12V ground connection bolt in the boot might not meet specifications

On affected vehicles a 12V ground connection bolt in the boot might not meet specifications.

Put right by: Check and rework if necessary.

DVSA R/2023/259549 vehicles affected in the UK
🏛️ August 2023Cars built June 2021 to December 2022

On affected vehicles the fuel pump impeller might not meet specifications and may deform.

On affected vehicles the fuel pump impeller might not meet specifications and may deform.

Put right by: Replace the fuel pump module.

DVSA R/2023/223486 vehicles affected in the UK
🏛️ August 2023Cars built July 2020 to October 2022

On affected vehicles a bolt connection in the engine compartment main fuse box might not meet specifications and the torque of the bolt connection may not be sufficient.

On affected vehicles a bolt connection in the engine compartment main fuse box might not meet specifications and the torque of the bolt connection may not be sufficient.

Put right by: Check the bolt connection and repair if necessary.

DVSA R/2023/245330 vehicles affected in the UK
🏛️ August 2023Cars built July 2020 to May 2021

On affected vehicles the voltage converter software of the secondary on-board electrical system might not meet specifications.

On affected vehicles the voltage converter software of the secondary on-board electrical system might not meet specifications.

Put right by: Update the voltage converter software of the secondary on-board electrical system via an over-the-air update in accordance with the Mercedes me terms of use or alternatively via its Mercedes-Benz service partners should the over-the-air update not be possible.

DVSA R/2023/148363 vehicles affected in the UK
🏛️ August 2023Cars built July 2020 to May 2021

On affected vehicles the voltage converter software of the secondary on-board electrical system might not meet specifications.

On affected vehicles the voltage converter software of the secondary on-board electrical system might not meet specifications.

Put right by: Update the voltage converter software of the secondary on-board electrical system via an over-the-air update in accordance with the Mercedes me terms of use or alternatively via its Mercedes-Benz service partners should the over-the-air update not be possible.

DVSA R/2023/149165 vehicles affected in the UK
🏛️ July 2023Cars built July 2021 to March 2023

THE MONITORING SOFTWARE OF THE ELECTRONIC STABILITY PROGRAM (EPS) MIGHT NOT MEET SPECIFICATIONs.

The monitoring software of the Electronic Stability Program (ESP) might not meet specifications.

Put right by: Update the software of the ESP control unit.

DVSA R/2023/1731,228 vehicles affected in the UK
🏛️ April 2023Cars built July 2020 to September 2020

On affected vehicles the firewall seal may not satisfy leak tightness requirements. Water may enter into the vehicle causing corrosion on electrical contacts function of the PreSafe system may be impaired and it may not be possible to restart a parked vehicle.

On affected vehicles the firewall seal may not satisfy leak tightness requirements. Water may enter into the vehicle causing corrosion on electrical contacts function of the PreSafe system may be impaired and it may not be possible to restart a parked vehicle.

Put right by: Install an additional seal for the firewall as a precautionary measure.

DVSA R/2023/1207 vehicles affected in the UK
🏛️ February 2023Cars built November 2013 to May 2016

On affected vehicles the aluminium bolts of the steering gear could corrode and break due to the intrusion of moisture.

On affected vehicles the aluminium bolts of the steering gear could corrode and break due to the intrusion of moisture.

Put right by: Replace the steering gear mounting bolts on the affected vehicles with steel bolts. Should the bolts break or already be broken change the steering gear.

DVSA R/2023/023102,502 vehicles affected in the UK
🏛️ October 2022Cars built March 2021 to November 2021

Software of the communication module may not correspond with the specifications

The software of the communication module may not correspond with the specifications.

Put right by: Update the software of the communication module in the affected vehicles.

DVSA R/2022/30056 vehicles affected in the UK
🏛️ May 2022Cars built February 2020 to January 2022

The hands-off detection might not detect when the driver's hands are away from the steering wheel

The hands-off detection might not detect when the driver's hands are away from the steering wheel.

Put right by: Update the coding of the hand detection system on the affected vehicles.

DVSA R/2022/114423 vehicles affected in the UK
🏛️ May 2022Cars built June 2020 to January 2022

The software of the rear signal acquisition and actuation module might not meet specifications

The software of the rear signal acquisition and actuation module might not meet specifications.

Put right by: Update the software of the signal acquisition and actuation module on the affected vehicles.

DVSA R/2022/117605 vehicles affected in the UK
🏛️ April 2022Cars built July 2020 to February 2021

The air bag control unit might not have been bolted according to specifications

The airbag control unit might not have been bolted according to specifications.

Put right by: Check the bolting of the airbag control unit on the affected vehicles and correct it if necessary.

DVSA R/2022/09562 vehicles affected in the UK
🏛️ April 2022Cars built February 2021 to August 2021

The overhead control panel might be deactivated permanently due to a software error

The overhead control panel under certain circumstances might be deactivated permanently due to a software error.

Put right by: Update the software of the overhead control panel.

DVSA R/2022/1126 vehicles affected in the UK
🏛️ March 2022Cars built March 2021 to December 2021

The software of the communication module might not meet specifications

On certain vehicles the software of the communication module might not meet specifications.

Put right by: As a precautionary measure update the software of the communication module on the affected vehicles. This software update is planned to be performed over-the-air with no workshop visit being required.

DVSA R/2022/032486 vehicles affected in the UK
🏛️ March 2022Cars built March 2021 to December 2021

The software of the communication module might not meet specifications

On certain vehicles the software of the communication module might not meet specifications.

Put right by: As a precautionary measure update the software of the communication module on the affected vehicles. This software update is planned to be performed over-the-air with no workshop visit being required.

DVSA R/2022/03063 vehicles affected in the UK
🏛️ February 2022Cars built December 2020 to January 2021

The configuration of the mbux system might not meet specifications

On certain vehicles with an active and connected Mercedes me connect account the configuration of the MBUX system might not meet specifications.

Put right by: Update the configuration of the MBUX system on affected vehicles.

DVSA R/2022/0185 vehicles affected in the UK
🏛️ February 2022Cars built June 2020 to July 2021

The communication module might not meet specifications

On certain vehicles the communication module might not meet specifications.

Put right by: Update the software including a correct configuration of the communication module on the affected vehicles.

DVSA R/2022/024221 vehicles affected in the UK
🏛️ January 2022Cars built April 2017 to October 2021

Coolant pump might have a leakage between the vacuum system and the coolant circuit

On certain vehicles with a Diesel engine the coolant pump which is controlled by vacuum might have a leakage between the vacuum system and the coolant circuit.

Put right by: Update the software of the coolant pump and replace the electrical switch valve on the affected vehicles.

DVSA R/2021/43835,624 vehicles affected in the UK
🏛️ January 2022Cars built December 2020 to October 2021

The configuration of the mbux system might not meet specifications.

On certain vehicles with an active and connected Mercedes me connect account the configuration of the MBUX system might not meet specifications.

Put right by: A remote update of the configuration of the MBUX system will be conducted without the need for a workshop visit.

DVSA R/2021/43425 vehicles affected in the UK
🏛️ January 2022Cars built October 2012 to October 2012

To achieve an improvement in the emissions

Daimler AG has come to an understanding with the (KBA) to achieve an improvement in the emissions.

Put right by: Update the diesel engine control unit software.

DVSA R/2021/3651 vehicles affected in the UK
🏛️ January 2022Cars built October 2021 to October 2021

Mounting screws of front axle brake callipers might not meet specifications

On vehicles with a fixedcaliperbrake system the mounting screws of thecaliperson the front axle may not meet specifications.

Put right by: Replace the screws on the front brakecaliperson the affected vehicles.

DVSA R/2021/38472 vehicles affected in the UK
🏛️ December 2021Cars built January 2016 to January 2021

The behaviour of the emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Put right by: Update the software of the communication module for the emergency call system.

DVSA R/2021/10623 vehicles affected in the UK
🏛️ November 2021Cars built January 2016 to January 2021

The behaviour of the emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Put right by: Update the software of the communication module for the emergency call system.

DVSA R/2021/37650,390 vehicles affected in the UK
🏛️ November 2021Cars built June 2020 to December 2020

The fuel level might not be displayed correctly

The movement of the fuel fill level sensor might be impaired.

Put right by: Modify the routing of the internal fuel line in the fuel tank on the affected vehicles

DVSA R/2021/3822 vehicles affected in the UK
🏛️ November 2021Cars built June 2020 to March 2021

The software of the air bag control unit might not meet specifications

The software of the airbag control unit might not meet specifications.

Put right by: Update the software of the airbag control unit on the affected vehicles.

DVSA R/2021/379441 vehicles affected in the UK
🏛️ November 2021Cars built June 2021 to August 2021

A nozzle inside the suction jet pump in the fuel tank might not have been installed or fixed inside the pump according to specifications

A nozzle inside the suction jet pump in the fuel tank might not have been installed or fixed inside the pump according to specifications.

Put right by: Conduct a check of the fuel system on the affected vehicles and replace the fuel tank including the suction jet pump if necessary.

DVSA R/2021/34088 vehicles affected in the UK
🏛️ September 2021Cars built June 2020 to July 2021

The communication module might not meet specifications

The communication module might not meet specifications.

Put right by: Update the software including a correct configuration of the communication module on the affected vehicles.

DVSA R/2021/308275 vehicles affected in the UK
🏛️ September 2021Cars built June 2020 to July 2021

The communications module might not meet specifications

The communication module might not meet specifications.

Put right by: Update the software including a correct configuration of the communication module on the affected vehicles.

DVSA R/2021/309339 vehicles affected in the UK
🏛️ August 2021Cars built July 2013 to October 2019

Vehicles with a panoramic sunroofthe polycarbonate panel may not have been bonded correctly during a prior service repair

The polycarbonate panel located between the windshield and the panoramic sunroof may not have been bonded correctly during a prior service repair.

Put right by: Remove the bonded panel and install a new polycarbonate panel if required.

DVSA R/2021/27461 vehicles affected in the UK
🏛️ August 2021Cars built November 2020 to February 2021

The bolting of the 48v wiring harness on a body sided support point might not meet specifications

The bolting of the 48V wiring harness on a body-sided support point might not meet specifications.

Put right by: Check the bolting of the 48V wiring harness on the affected vehicles and correct it if necessary.

DVSA R/2021/2807 vehicles affected in the UK
🏛️ May 2021Cars built January 2016 to January 2021

The behaviour of the emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Put right by: Update the software of the communication module for the emergency call system.

DVSA R/2021/110217,942 vehicles affected in the UK
🏛️ May 2021Cars built January 2016 to January 2021

The behaviour of the emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Put right by: Update the software of the communication module for the emergency call system.

DVSA R/2021/12086,604 vehicles affected in the UK
🏛️ May 2021Cars built January 2016 to January 2021

The behaviour of the emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Put right by: Update the software of the communication module for the emergency call system.

DVSA R/2021/11190,716 vehicles affected in the UK
🏛️ May 2021Cars built January 2016 to January 2021

The behaviour of the emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Put right by: Update the software of the communication module for the emergency call system.

DVSA R/2021/1287 vehicles affected in the UK
🏛️ May 2021Cars built January 2016 to January 2021

The behaviour of the emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Put right by: Update the software of the communication module for the emergency call system.

DVSA R/2021/13181,267 vehicles affected in the UK
🏛️ May 2021Cars built January 2016 to January 2021

The behaviour of the emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Put right by: Update the software of the communication module for the emergency call system.

DVSA R/2021/13210,410 vehicles affected in the UK
🏛️ May 2021Cars built January 2016 to January 2021

The emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Put right by: Update the software of the communication module for the emergency call system.

DVSA R/2021/133106,665 vehicles affected in the UK
🏛️ May 2021Cars built January 2016 to January 2021

The behaviour of the emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Put right by: Update the software of the communication module for the emergency call system.

DVSA R/2021/134162,581 vehicles affected in the UK
🏛️ March 2021Cars built May 2016 to July 2020

The communication module may be deactivated

The communication module may be deactivated

Put right by: Carry out a check of the configuration of the communication module on affected vehicles and if necessary activate the communication module.

DVSA R/2021/08224 vehicles affected in the UK
🏛️ January 2021Cars built November 2020 to January 2021

The inner tie rods on the front axle steering are the improper length for the vehicle type

Vehicles may have been equipped with inner tie rods on the front axle steering that are the improper length.

Put right by: Check the inner tie rods on the affected vehicles and replace them if necessary.

DVSA R/2020/38642 vehicles affected in the UK
🏛️ October 2020Cars built March 2017 to September 2018

THE EMERGENCY CALL SYSTEM (eCall) DOES NOT MEET THE SPECIFICATION

On affected vehicles the software of the communication module for the emergency call system does not meet the specification

Put right by: Update the software of the communication module for the emergency call system

DVSA R/2020/2363,127 vehicles affected in the UK
🏛️ October 2020Cars built March 2016 to February 2019

The seat belt warning function does not meet the specification

The seat belt warning function does not meet the specification

Put right by: Activate the correct seat belt warning scenario in the instrument cluster

DVSA R/2020/24045 vehicles affected in the UK
🏛️ October 2020Cars built November 2011 to May 2018

Engine control unit software to be updated

Improve the vehicle emissions via software updates.

Put right by: Update the relevant control units software and if necessary replace the NOx sensors.

DVSA R/2020/243994 vehicles affected in the UK
🏛️ August 2020Cars built June 2018 to March 2020

The data documenting the correct mounting of the turbocharger oil feed as well as the oil return line may be missing

The HV battery pack can overheat and result in the venting of hot gas which can ignite vehicle components or in extreme cases the entire vehicle.

Put right by: To prevent a vehicle fire the vehicles should not be charged using the external charging cable and the vehicles should only be driven using the default Auto EV mode only

DVSA R/2020/225124 vehicles affected in the UK
🏛️ July 2020Cars built August 2017 to August 2018

The material of two closure plugs on the engine may not withstand the maximum loads whilst driving

The material of two closure plugs on the engine might not withstand the maximum loads while driving.

Put right by: Rework the closure plugs on the engine on the affected vehicles

DVSA R/2020/18896 vehicles affected in the UK
🏛️ February 2020Cars built February 2018 to February 2018

The threaded connection of a chain wheel to the crankcase might not meet specifications

The threaded connection of a chain wheel to the engine crankcase might not meet specifications.

Put right by: Replace the Engine of affected vehicles

DVSA R/2019/3891 vehicles affected in the UK
🏛️ November 2019Cars built June 2018 to September 2018

On activation of the curtain air bag the pillar cover may detach

The curtain airbag might not deploy as intended.

Put right by: Check the installation of the pillar covers and correct if necessary.

DVSA R/2019/2801 vehicles affected in the UK
🏛️ September 2019Cars built February 2017 to July 2019

The software of the radar control unit may not meet specification

; The software of the radar control unit might not meet the specification

Put right by: Update the software of the radar sensor control unit on the affected vehicles.

DVSA R/2019/269294 vehicles affected in the UK
🏛️ September 2019Cars built June 2012 to November 2017

To achieve an improvement in the emissions via software updates

Improve the vehicle emissions via software updates.

Put right by: Update the diesel engine control unit software and add a supplementary booklet for the operator's manual

DVSA R/2019/25625,647 vehicles affected in the UK
🏛️ May 2019Cars built June 2018 to October 2018

Switches in certain seat belt buckles may not have been manufactured to specifications

The switches in certain seat belt buckles might not have been manufactured according to specifications.

Put right by: The affected seat belt buckles are to be replaced.

DVSA R/2019/0402,570 vehicles affected in the UK
🏛️ May 2019Cars built June 2018 to October 2018

Switches in certain seat belt buckles may not have been manufactured to specifications

The switches in certain seat belt buckles might not have been manufactured according to specifications.

Put right by: The affected seat belt buckles are to be replaced.

DVSA R/2019/04190 vehicles affected in the UK
🏛️ April 2019Cars built May 2016 to August 2018

A reset in the cpc control unit could occur whilst driving

The ECO Start-Stop function may be disabled and cause the vehicle to stall.

Put right by: The affected vehicles are to be recalled and the software updated.

DVSA R/2019/10869 vehicles affected in the UK
🏛️ April 2019Cars built January 2017 to July 2018

Hands off detection function might not meet specifications

The Hands-off-Detection function (HoD) might not meet specifications.

Put right by: The position of the steering boot will be checked and corrected if necessary.

DVSA R/2019/0981 vehicles affected in the UK
🏛️ October 2018Cars built December 2013 to May 2018

To improve emissions of the affected vehicles.certain calibrations of functionalities must be changed in the engine management

Improve the vehicle emissions via software updates.

Put right by: Update the diesel engine control unit software and add a supplementary booklet for the operator's manual

DVSA R/2018/26615,692 vehicles affected in the UK
🏛️ October 2018Cars built January 2017 to March 2018

Certain parameters of the active lane keeping assist within the multipurpose camera software may not meet specification

Active Lane Keeping Assist might not initiate a brake intervention in case of an unwanted lane change.

Put right by: Update the multipurpose camera software of affected vehicles.

DVSA R/2018/24934 vehicles affected in the UK
🏛️ September 2018Cars built August 2017 to February 2018

Two nuts attaching the busbars within the prefuse box in the trunk may not have been installed

Two nuts attatching the busbars within the prefuse box may not have been installed

Put right by: Check the prefuse box and replace if necessary on affected vehicles

DVSA R/2018/221376 vehicles affected in the UK
🏛️ February 2018Cars built April 2016 to March 2017

Front seat belt tensioners may not function

The front seatbelt pre-tensioner ignitors may not perform as expected. This could increase the risk of injury to the seat occupants. The lock function of the seatbelts is not impaired.

Put right by: On affected vehicles replace seatbelts with quality assured units.

DVSA R/2018/010296 vehicles affected in the UK
🏛️ October 2017Cars built April 2016 to March 2017

Right front seat belt pre-tensioner may not meet specification

The right front seat belt pretensioner may not conform to specification. This may adversely affect it's operation in the event of an accident.

Put right by: Replace the pretensioner on affected vehicles.

DVSA R/2017/253135 vehicles affected in the UK
🏛️ September 2017Cars built April 2016 to March 2017

Left front seat belt pre-tensioner may not meet specification

The propellant mix in certain seatbelt pre-tensioners ignitors may be incorrect. If the front seatbelt pre-tensioners are deployed the lock function of the pre-tensioners cannot be guaranteed.

Put right by: Recall the vehicles that are likely to be affected and replace the front seatbelts that are likely to be affected.

DVSA R/2017/14778 vehicles affected in the UK
🏛️ July 2017Cars built January 2017 to May 2017

Some occupant safety systems may malfunction in the event of a collision

Due to incorrect wiring assembly the vehicles main power supply is disconnected after airbag deployment. This will affect the operation of vehicle safety functions such as automatically unlocking doors. The SRS systems are still functional.

Put right by: On affected vehicles carry out manufacturer's recommended modification.

DVSA R/2017/23345 vehicles affected in the UK
🏛️ July 2017Cars built October 2016 to May 2017

Oil leak from turbocharger feed pipe.

Under certain conditions the oil feed pipe to the turbocharger may leak.Oil may contact hot components and there is a risk of fire.

Put right by: On affected vehicles replace the oil feed line to the turbocharger.

DVSA R/2017/21473 vehicles affected in the UK
🏛️ April 2017Cars built January 2004 to March 2017

Faulty control unit may cause vehicle to perform outside specification

Where a control unit coding was updated in a workshop between 3 December 2016 and 5 December 2016 the coding may not correspond to the specification and may trigger unplanned action in the vehicle. The safety and emissions systems may not react as design intent.

Put right by: Recall the vehicles that are likely to be affected and update the software in the corresponding control units.

DVSA R/2017/12442 vehicles affected in the UK
🏛️ December 2016Cars built February 2015 to March 2016

Extended seat belt may malfunction and reduce effectiveness of shoulder belt

It has been identified that the rear seatbelt extender may not retract as intended due to an issue with the individual friction conditions experienced by the belt extender which have not be programmed into the control unit. Should the pretensioners deploy during a collision then there is the potential that the extender may fail and break leaving broken edges which can cause a risk of a serious injury or higher occupant loading.

Put right by: Recall all affected vehicles and recode the rear control unit on the vehicle.

DVSA R/2016/270116 vehicles affected in the UK
🏛️ October 2016Cars built April 2014 to April 2016

Automatic transmission may malfunction

It has been identified on certain 6 cylinder diesel engine/9 speed automatic transmission vehicles the starter/alternator/transmission wiring harness may be too close to the exhaust system. If it is then there is a risk that the wiring harness may suffer heat damage which can result in the transmission inadvertently selecting neutral whilst driving the Auto P function or the manual P function in the transmission not being available. The manually operated parking brake will still function.

Put right by: Recall all affected vehicles to check and if required reroute or replace the wiring harness. The type of action is dependant on the amount of damage present.

DVSA R/2016/235723 vehicles affected in the UK
🏛️ January 2016Cars built August 2013 to November 2015

Auto stop/start may shutdown without warning

Incorrect software may have been installed during manufacture. This may cause erratic idling when coming to a halt and the engine may shut down. Consequently the auto start/stop may not operate as intended.

Put right by: On affected vehicles update the powertrain control software.

DVSA R/2015/232660 vehicles affected in the UK
🏛️ January 2016Cars built August 2012 to August 2015

Stop start engine may not restart

The excess length of the wiring harness to the engine control unit could result in a faulty camshaft signal. This faulty camshaft signal may lead to an unintentional cancellation of the automatic starting procedure after automatic engine stop of the automatic start/stop system. In the event of a faulty camshaft signal the engine would not restart as expected following the stop procedure but can be manually restarted immediately by engaging the transmission selector lever position N or D and by operating the ignition key or the start button (with keyless go). Depending on the traffic situation however an increased accident hazard could result.

Put right by: Recall the vehicles that are likely to be affected and rework the wiring harness to the engine control unit on the affected vehicles as a precautionary measure.

DVSA R/2015/2471,126 vehicles affected in the UK
🏛️ January 2016Cars built April 2015 to July 2015

Transmission may lock at low speed

The high-voltage battery charger may not have been produced to specification which could lead to an incorrect detection of an external charging cable. This in turn can lead the request for P to be activated. If the speed is less than 5 km/h the transmission would activate the park pawl function which will prevent the vehicle from driving further and could increase the risk of an incident.

Put right by: Recall the vehicles that are likely to be affected and replace the high-voltage charger on the affected vehicles.

DVSA R/2015/24813 vehicles affected in the UK
🏛️ November 2015Cars built February 2013 to April 2015

Combustion engine may fail to start

Incorrect software may cause the combustion engine to non start during use. Restarting the vehicle by using the key will reset the system

Put right by: On affected vehicles update the software for the fuel control unit.

DVSA R/2015/211620 vehicles affected in the UK
🏛️ November 2015Cars built May 2014 to April 2015

Front seat belts may not perform as intended

The front seat belts may have been wrongly installed and may not fully perform as intended.

Put right by: On affected vehicles check installation and correct if necessary.

DVSA R/2015/196183 vehicles affected in the UK
🏛️ August 2014Cars built March 2014 to May 2014

Airbag may not perform as specified

The front passenger air bag module may not have been installed according to specifications. If activated it is possible that separate parts of the passenger air bag module may become loose and may detach.

Put right by: Recall affected vehicles and replace air bag module

DVSA R/2014/085712 vehicles affected in the UK
🏛️ December 2013

Seat belts have not been installed correctly

In rare individual cases the connections of the belts to the front seats may not be installed correctly. As a result on a small batch of vehicles it cannot be completely ruled out that the restraint effect could be impaired with extremely high loads.

Put right by: Recall the vehicles that are likely to be affected to check and where necessary correct the belt end fitting.

DVSA R/2013/13926 vehicles affected in the UK
🏛️ March 2013

Fuel may leak

The flange of the fuel filter may leak due to a non-compliance in the supplier's production process. Should this occur a fuel odour may arise or fuel escape.

Put right by: Recall the vehicles that are likely to be affected to replace the fuel filter.

DVSA R/2013/031806 vehicles affected in the UK
🏛️ January 2012Cars built January 2009 to December 2011

Fuel may leak

Fuel leaks in the plug area of the drain opening may occur at the fuel filter with integrated fuel heaters. Fuel can escape and is noticeable to the customer due to a corresponding diesel odour. The diesel can reach the road and as a result friction between the tyres and road surface may be decreased.

Put right by: Check filter and replace as necessary.

DVSA R/2011/17222,298 vehicles affected in the UK
🏛️ December 2011

Front seat belt height adjusters may fail

The treaded connection of the front belt height adjuster may not correspond to the high quality required of Mercedes Benz under heavy loads.

Put right by: Replace the front height adjusters including the threaded connection.

DVSA R/2011/15133 vehicles affected in the UK

Recall data published by the Driver and Vehicle Standards Agency under the Open Government Licence v3.0. A recall listed here may not apply to every car of this model: the build dates and the registration check are what decide it.

Mercedes-Benz S-Class timing chain, and service intervals

A timing chain has no change interval, which is not the same as lasting for ever. Listen for it on a used S-Class, and check the oil has been changed on time. These are the figures UK specialists work to.

Automatic gearbox oil
7G-TRONIC, 722.9, 7 SPEED
40,000 miles or 4 years, whichever comes first

Mercedes initially claimed 'filled for life', which specialists call marketing over engineering. The recommendation is a fluid and filter change every 40,000 miles to prevent conductor plate failure, a GBP 800-1,200 repair. Some sources suggest 60,000 miles, so the shorter figure is recorded.

Automatic gearbox oil
9G-TRONIC, 725.0, 9 SPEED
60,000 miles or 6 years, whichever comes first

The published figure for the 725.0 is six years or 60,000 miles, whichever comes first. Other sources give the first factory change as roughly 60,000 km (about 37,000 miles) or 6 years, and forum consensus favours servicing at 40,000 miles, so treat 60,000 as the outer limit rather than a target.

Automatic gearbox oil
722.6, 5G-TRONIC, 5 SPEED
40,000 miles

Officially 'sealed for life' but independent specialists recommend ATF (MB 236.14 spec, which supersedes 236.10 and 236.12) and filter changes every 40,000 miles to head off valve body and conductor plate trouble. Capacity is about 7.5 litres. Fitted to most pre-2011 rear-wheel-drive Mercedes including the pre-2010 C, E and SLK.

Timing chainChain
M112, M113, 3.2 V6, 4.3 V8, 5.0 V8
No fixed replacement interval

Timing chain rather than a belt, with a deserved reputation for toughness: these engines regularly exceed 200,000-250,000 miles without internal rebuilds when oil changes are respected. No scheduled replacement. The known weak spot at high mileage is the chain tensioner, so listen for rattle on cold start. Covers the E320/CLK320-era M112 V6 and the 4.3/5.0/5.4 M113 V8s such as the E430 and S500.

Always confirm against the vehicle handbook. Intervals vary by engine, and several manufacturers revised theirs after failures in service.

Repair costs are typical UK ranges, not quotes. Actual cost depends on condition and garage.Data last verified: November 2026

Mercedes-Benz S-Class buying questions

What are the most common Mercedes-Benz S-Class problems?

Three stand out. Suspension: air suspension compressor failure, relay failure, or leaking air struts causing the car to collapse (typically 80000 to 120000 miles). Fuel system: premature injector failure and failure of injector 'fire seals' are common (typically 60000 to 100000 miles). Gearbox: 7G-Tronic conductor plate (electrohydraulic control unit) speed sensor failure (typically 60000 to 100000 miles). The full list above is grouped by generation, with typical mileage and a rough repair cost for each.

Which Mercedes-Benz S-Class years should I avoid?

No Mercedes-Benz S-Class year is a write-off, but the W220 (1998 to 2005) carries the most serious faults: suspension and fuel system. The W221 (2005 to 2013), W222 (2013 to 2020) and W223 (2020 on) have none rated high severity. Year matters less than whether the specific car has had the known fixes, so check the history for them.

What should I check when viewing a used Mercedes-Benz S-Class?

Ask the seller about the suspension, fuel system and gearbox faults on this page and whether they have been fixed, with invoices. On the test drive watch for car sitting very low over the wheels, smell of neat fuel (paraffin-like) in the cabin and gearbox stuck in one gear (limp mode). Read the MOT history for repeat advisories, then paste the advert into the free check, which reads it against all 6 known faults before you travel. Check a Mercedes-Benz S-Class advert →

Are there any recalls on the Mercedes-Benz S-Class?

The DVSA lists 78 safety recalls for the Mercedes-Benz S-Class issued between 2011 and 2026. The most recent, from June 2026, is "SRPC2604 - Windshield bonding". Recall work is done by the manufacturer, and GOV.UK says you will not usually have to pay for it. This list is by model, so it cannot tell you whether one particular car has had the work: the free GOV.UK MOT history check shows a recall status from the registration where the manufacturer shares it, and a franchised dealer can check the VIN.

What is the real MPG of a Mercedes-Benz S-Class?

Owners report 33.4 mpg on average across the Mercedes-Benz S-Class engines with data, about 84% of the official combined figure. The gap between official and real-world economy varies a lot by engine, so the Real MPG page lists every engine and generation separately, from 262 owner submissions. Mercedes-Benz S-Class Real MPG by engine →

Looking at a Mercedes-Benz S-Class right now? Check the advert before you go and see it.

Where this Mercedes-Benz S-Class fault data comes from

If you used to check the Honest John “Good & Bad” section before the site closed in 2026, this page is where that information now lives. We rebuilt the Mercedes-Benz S-Class owner-report history from the archived Honest John dataset, added our own research, specialist and owner-club sources and DVSA recall data, and we keep it free. Each fault above is badged with its source. The same data feeds our free advert check, which reads a listing against every known fault for the exact engine and year.

CarAdCheck is not affiliated with Honest John or Volkswagen Financial Services. What happened to Honest John, and where each feature lives now.

Before you go and see it

Knowing what a Mercedes-Benz S-Class goes wrong with is half of it. The rest is reading the advert and checking the car's history before you hand any money over.

Buying a car at auction: who can bid, your rights, and how to set your limit12 min readBuying a car from a private seller: your rights, the checks and how to pay12 min readMotorhome check: what to check before you buy a used motorhome7 min read
All buyer's guides →

Other Mercedes-Benz models

E-Class27 known faultsC-Class24 known faultsA-Class13 known faultsM-Class8 known faults