AI DamageMercedes-Benz S Class reliability: problems, complaints, recalls
Summary for the Mercedes-Benz S Class across 14 model years: 271 owner complaints and 0 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
What fails most often
- 1 Electrical system 42% of all complaints
- 2 Suspension 21% of all complaints
- 3 Air bags 7% of all complaints
- 4 Engine and cooling 5% of all complaints
- 5 Powertrain 4% of all complaints
- 6 Equipment 4% of all complaints
- 7 Tires 4% of all complaints
- 8 Visibility 3% of all complaints
- Electrical system: 113 complaints (42% of all).
- Suspension: 57 complaints (21% of all).
- Air bags: 19 complaints (7% of all), 4 of them with a crash reported by the owner.
- Engine and cooling: 14 complaints (5% of all).
- Powertrain: 12 complaints (4% of all), 1 of them with a crash reported by the owner.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 3 L · petrol · turbo · 6 cyl 2018–2020
- 3.2 L · petrol · 6 cyl 1994–1999
- 3.7 L · petrol · 6 cyl 2006
- 4 L · petrol · turbo · 8 cyl 2018–2021
- 4.2 L · petrol · 8 cyl 1994–1999
- 4.3 L · petrol · 8 cyl 2000–2006
- 4.7 L · petrol · turbo · 8 cyl 2012–2017
- 5 L · petrol · 6 cyl 1998
- 5 L · petrol · 8 cyl 1994–2006
- 5 L · petrol · turbo · 8 cyl 2003
- 5.4 L · petrol · 8 cyl 2001–2002
- 5.4 L · petrol · turbo · 8 cyl 2004–2006
- 5.5 L · petrol · 8 cyl 2007–2011
- 5.5 L · petrol · turbo · 8 cyl 2011–2017
- 5.5 L · petrol · turbo · 12 cyl 2003–2013
- 5.8 L · petrol · 12 cyl 2001–2002
- 6 L · petrol · 12 cyl 1994–1999
- 6 L · petrol · turbo · 12 cyl 2006–2027
- 6.2 L · petrol · 8 cyl 2008–2009
- 6.3 L · petrol · 8 cyl 2010
- 3 L · hybrid · 6 cyl 2021–2023
- 3 L · hybrid · turbo · 6 cyl 2024–2027
- 3 L · plug-in hybrid · turbo · 4 cyl 2019
- 3 L · plug-in hybrid · turbo · 6 cyl 2015–2025
- 3.5 L · diesel · turbo · 6 cyl 1994–1995named in 1 complaints
- 3.5 L · hybrid · 6 cyl 2010–2013
- 4 L · hybrid · turbo · 8 cyl 2021–2027
- 4 L · plug-in hybrid · turbo · 8 cyl 2025
- automatic, 4-speed 1994–1995
- automatic, 5-speed 1994–2013
- automatic, 7-speed 2004–2020
- automatic, 9-speed 2017–2027
Drive: RWD, AWD, 4WD, FWD
Symptoms owners describe
How many of the 271 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 113 | 0 | 0 |
| Suspension | 57 | 0 | 0 |
| Air bags | 19 | 4 | 0 |
| Engine and cooling | 14 | 0 | 0 |
| Powertrain | 12 | 1 | 0 |
| Equipment | 10 | 0 | 0 |
| Tires | 10 | 1 | 0 |
| Visibility | 9 | 0 | 0 |
| Seat belts | 8 | 0 | 0 |
| Latches, locks, linkages | 5 | 0 | 0 |
| Service brakes | 5 | 2 | 0 |
| Steering | 5 | 0 | 0 |
| Structure | 4 | 0 | 0 |
| Vehicle speed control | 4 | 1 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
2012 mercedes s550. Consumer states vehicle slid backwards in parking lot the consumer stated the safety issue was regarding the vehicle being put in the neutral position after turning off the engine. The consumer stated three weeks ago, he had the misfortune of parking his vehicle in a parking lot.
The frontal air bags did not deploy and the sos system did not engage. There were no reported injuries. A police report was available (sp1l15000802). The vehicle was towed to a local repair facility. The manufacturer was not contacted. The failure and the current mileages were 8,000.
Mercedes benz s 500 had total brake failure. Vehicle has about 12,000 to 14,000 miles on it. Dealer is trying to blame brake failure on rust on rotors due to lack of use of vehicle. I don't think the manual warns about this. Sounds like a make up story to me.
Airbags in 1999 s500 mercedes failed to deploy in frontal collision with a utility pole at speed estimated between 15-25 mph. Driver was wearing his seat belt.
Vehicle was hit by a semi-truck on driver side throwing drivers head and body into side door/glass windows. No air bags deployed! Car was severely damaged and was repaired by farmers insurance repair. Air bags were not replaced!!!! Driver suffered upper body trauma, particularly rib cage. Total air bag failure.
In january 2006, after 10000 mi, a blowout on the highway 101 "grapevine". Was able to control the car, used spare to get home, and had the tire replaced due to tread separation.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Suspension. Wheel alignment, control arms, subframe, even tire wear.
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
Other models of this make
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-06.