AI Damage2008 Mercedes-Benz S 550: common problems
Owners of the 2008 Mercedes-Benz S 550 filed 19 complaints with NHTSA, most often about electrical system and tires. Details by component below, with sources.
Key figures
- Owner complaints
- 19
- involving a crash
- 1
What fails most often
- 1 Electrical system 21% of all complaints
- 2 Tires 21% of all complaints
- 3 Engine 11% of all complaints
- 4 Equipment 11% of all complaints
- 5 Fuel system 11% of all complaints
- 6 Powertrain 11% of all complaints
- 7 Suspension 11% of all complaints
- 8 Air bags 5% of all complaints
- Electrical system: 4 complaints (21% of all).
- Tires: 4 complaints (21% of all).
- Engine: 2 complaints (11% of all).
- Equipment: 2 complaints (11% of all).
- Fuel system: 2 complaints (11% of all).
Symptoms owners describe
How many of the 19 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 | 4 | 0 | 0 |
| Tires | 4 | 0 | 0 |
| Engine | 2 | 0 | 0 |
| Equipment | 2 | 0 | 0 |
| Fuel system | 2 | 0 | 0 |
| Powertrain | 2 | 0 | 0 |
| Suspension | 2 | 0 | 0 |
| Air bags | 1 | 1 | 0 |
| Fuel/propulsion system | 1 | 0 | 0 |
| Seats | 1 | 1 | 0 |
| Service brakes | 1 | 0 | 0 |
| Vehicle speed control | 1 | 0 | 0 |
| Wheels | 1 | 0 | 0 |
| Other | 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.
Tl* the contact owns a 2008 mercedes-benz s550. The contact stated that while stopped, the vehicle was suddenly rear-ended causing the vehicle's driver and passenger front seat head rest air bags to deploy.
When it wears, it throws off the engine timing, leading to check engine lights, rough idling, reduced power, and even stalling. In some cases, the engine can shut down while driving, which is a major safety risk.
The contact stated while driving 40-50 MPH, the vehicle was shuddering intermittently. The contact stated that the failure recurred while at a complete stop. The check engine warning light was illuminated. The contact stated that the failure had been recurring intermittently.
We were traveling home and our TPMS indicated a tire failure. The PSI starting dropping rapidly. We took the tire off and found that only 4 " of rubber holding the back sidewall together on the tire.
Additionally, the contact stated while starting the vehicle on several occasions, the message " SAFETY " was displayed on the infotainment system screen. The check engine warning light was illuminated, and the messages "Active Head Lamp Inoperative" and "Service Required. Do Not Shift Gears" were displayed.
P-rc-200808004 body control acceleration sensors...models 2001-2008 11/4/2008 - 200807001 re-code the software calibration number (scn) 11/04/2008 - 200803005 replace front sam s-sc-[phone] retrofit adapter wiring harness on camshaft adustment solenoids models 2005-2011 s-rc-200807001 revision to step z, in work…
Even change to new tires, the air pressure up to 37 and always after 1 week or so, down to 33, complain and change tire and still have the same result. You could only check the tire pressure after you run for a while. Massage chair, after operation and all the sudden it stop.
There has not been any external gas leakage or performance issues with the car. Only the gas ordor that has given me a headache and makes me nauseated. The car only has 70,000 miles on it.
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 8,437 of 36,656 model years in the NHTSA data (top 23% most complained about).
On average one model year of the S 550 has 16 complaints (13 years in the data). This year has 19, above average.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Tires. Tire age by DOT code, bulges, wear pattern.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Fuel system. Fuel smell, leaks, rough running, fuel-system codes.
Other years of this model
Questions and answers
What are the most common problems with the 2008 Mercedes-Benz S 550?
Owner complaints to NHTSA most often mention: electrical system, tires, engine. Total complaints: 19. The most frequent symptoms in complaint texts: warning lights, check engine (21%), stalls while driving (11%), fuel system, fuel smell (5%).
How many service bulletins (TSB) were issued for the 2008 Mercedes-Benz S 550?
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 2008 Mercedes-Benz S 550 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 2008 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.