AI Damage2003 Mercedes-Benz SL500: common problems
Owners of the 2003 Mercedes-Benz SL500 filed 80 complaints with NHTSA, most often about suspension and service brakes. Details by component below, with sources.
Key figures
- Owner complaints
- 80
- involving a crash
- 2
What fails most often
- 1 Suspension 43% of all complaints
- 2 Service brakes 18% of all complaints
- 3 Fuel system 15% of all complaints
- 4 Electrical system 13% of all complaints
- 5 Fuel/propulsion system 10% of all complaints
- 6 Steering 8% of all complaints
- 7 Electronic stability control 6% of all complaints
- 8 Air bags 5% of all complaints
- Suspension: 34 complaints (43% of all).
- Service brakes: 14 complaints (18% of all), 1 of them with a crash reported by the owner.
- Fuel system: 12 complaints (15% of all).
- Electrical system: 10 complaints (13% of all).
- Fuel/propulsion system: 8 complaints (10% of all).
Symptoms owners describe
How many of the 80 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 | 34 | 0 | 0 |
| Service brakes | 14 | 1 | 0 |
| Fuel system | 12 | 0 | 0 |
| Electrical system | 10 | 0 | 0 |
| Fuel/propulsion system | 8 | 0 | 0 |
| Steering | 6 | 0 | 0 |
| Electronic stability control | 5 | 0 | 0 |
| Air bags | 4 | 1 | 0 |
| Engine and cooling | 4 | 0 | 0 |
| Powertrain | 4 | 0 | 0 |
| Structure | 3 | 0 | 0 |
| Engine | 2 | 0 | 0 |
| Equipment | 1 | 0 | 0 |
| Seat belts | 1 | 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.
The air bags did not deploy. The contact sustained minor injuries as a result of the crash. A police report was available. The vehicle was destroyed. The failure and current mileage was 87,000.
The contact stated that the abs warning light illuminated on the warning panel. The dealer repaired the abs switch seal and added synthetic hydraulic fluid to the vehicle to correct the failure. One month later, the abs warning light illuminated.
To who may this concerned, I have a 2003 Mercedes SL500 and recently found my battery control module caught on fire and burnt a section of my car. I have tried reaching out to Mercedes directly first and they said the car is 20 years ago and it could have not be a manufactured defect.
I have noticed there has been a lot of incidents out there where the battery control module in the SL 500s have caught fire! I am concerned for my safety due to this defect!
The contact stated while driving at various speeds, the ABC warning light illuminated. Additionally, the message "Drive Carefully" was displayed. The vehicle was taken to an independent mechanic, where it was diagnosed that the ABC tandem pump, struts, and hoses needed to be replaced.
Smoke was coming from under the car and the front end of the vehicle collapsed downwardly. I had to call for a tow truck to take my vehicle to the MB dealership. I'm I am waiting for the prognosis. I've had numerous issues with the All Body Control system. Expensive repairs in the $3000-$8000 range.
The parking brake was activated however, the vehicle failed to respond as designed. The contact was however able to pull over and eventually the vehicle came to a complete stop. The vehicle was towed.
The 2003 SL500 with seemingly no instigating incident or event had the gas tank baffle come apart due to the poor and faulty design of this component. This baffle now is loose and floats on the gas in the gas tank, banging around when there is acceleration or deceleration, even turning sometimes causes it to bang…
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 4,081 of 36,656 model years in the NHTSA data (top 11% most complained about).
On average one model year of the SL500 has 14 complaints (16 years in the data). This year has 80, above average.
What to check before buying
- Suspension. Wheel alignment, control arms, subframe, even tire wear.
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
- Fuel system. Fuel smell, leaks, rough running, fuel-system codes.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
Other years of this model
Questions and answers
What are the most common problems with the 2003 Mercedes-Benz SL500?
Owner complaints to NHTSA most often mention: suspension, service brakes, fuel system. Total complaints: 80. The most frequent symptoms in complaint texts: warning lights, check engine (14%), smoke, burning smell, fire (9%), knocking, grinding or other noise (5%).
How many service bulletins (TSB) were issued for the 2003 Mercedes-Benz SL500?
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 SL500 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.