AI Damage2003 Mercedes-Benz S Class: common problems
Owners of the 2003 Mercedes-Benz S Class filed 28 complaints with NHTSA, most often about suspension and electrical system. Details by component below, with sources.
Key figures
- Owner complaints
- 28
What fails most often
- 1 Suspension 25% of all complaints
- 2 Electrical system 21% of all complaints
- 3 Air bags 14% of all complaints
- 4 Seat belts 14% of all complaints
- 5 Latches, locks, linkages 11% of all complaints
- 6 Engine and cooling 7% of all complaints
- 7 Equipment 7% of all complaints
- 8 Powertrain 7% of all complaints
- Suspension: 7 complaints (25% of all).
- Electrical system: 6 complaints (21% of all).
- Air bags: 4 complaints (14% of all).
- Seat belts: 4 complaints (14% of all).
- Latches, locks, linkages: 3 complaints (11% of all).
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 4.3 L · petrol · 8 cyl
- 5 L · petrol · 8 cyl
- 5 L · petrol · turbo · 8 cyl
- 5.5 L · petrol · turbo · 12 cyl
- automatic, 5-speed
Drive: RWD, AWD
Symptoms owners describe
How many of the 28 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) |
|---|---|---|---|
| Suspension | 7 | 0 | 0 |
| Electrical system | 6 | 0 | 0 |
| Air bags | 4 | 0 | 0 |
| Seat belts | 4 | 0 | 0 |
| Latches, locks, linkages | 3 | 0 | 0 |
| Engine and cooling | 2 | 0 | 0 |
| Equipment | 2 | 0 | 0 |
| Powertrain | 2 | 0 | 0 |
| Structure | 2 | 0 | 0 |
| Fuel system | 1 | 0 | 0 |
| Service brakes | 1 | 0 | 0 |
| Steering | 1 | 0 | 0 |
| Tires | 1 | 0 | 0 |
| Other | 2 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
This is due to a defective seatbelt buckle and a defective passenger recognition sensor pad located in the front passenger seat which disables/enables the airbags functionality. Both a very common defect in the 2000 to 2006 model year mercedes benz s class vehicles.
The contact stated that the seat belt would not retract properly whenever there were warmer temperatures. The vehicle was inspected by a dealer and the dealer was unable to determine the failure.
The driver's side seat belt does not work properly during hot weather. More particularly, the belt will not extend. It is impossible to pull the belt out enough to fasten it. Thus, the only way the car can be driven in hot weather is without the driver wearing a seat belt.
When vehicle gets cold( outside temp below 17 f), the car will lower, and airomatic warning message comes on saying airomatic vehicle too low stop visit shop.
When temperature falls below 17 degrees f, the vehicle drop to unsafe level, and message says airmatic stop car vehicle too low. The tires will start rubbing on liner. Called dealer they said temperature in germany does not go that low, well this car is sold in us, and they need to make it work.
The airbag warning light came on and the dealer cleared the fault code. This lasted one week and then the warning reappeared. They did not know if this condition would result in a deployment whether warranted or not. It seemed to us that it was unsafe to drive regardless.
Shifter stuck in park. There are probably hundreds, possibly even thousands of mercedes owners that have experienced this problem. For no apparent reason and without any warning the shifter locks in park. You turn the car on and it will not move even if using a 16 pound rubber mallet to bang the shifter.
Shifter stuck in park due to the only plastic part ( shifter module) in the shifter box. Mercedes headquarters take no responsibility for such an expensive fix when plastic part breaks.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 7,081 of 36,656 model years in the NHTSA data (top 19% most complained about).
On average one model year of the S Class has 19 complaints (14 years in the data). This year has 28, above average.
What to check before buying
- Suspension. Wheel alignment, control arms, subframe, even tire wear.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
- Seat belts. Belt pretensioners after airbag deployment, SRS codes.
Other years of this model
Questions and answers
What are the most common problems with the 2003 Mercedes-Benz S Class?
Owner complaints to NHTSA most often mention: suspension, electrical system, air bags. Total complaints: 28. The most frequent symptoms in complaint texts: seat belts (14%), warning lights, check engine (14%), airbag warning light (7%).
How many service bulletins (TSB) were issued for the 2003 Mercedes-Benz S Class?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2003 Mercedes-Benz S Class from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2003 models
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 2026-11-05.