AI Damage2011 Mercedes-Benz S 550: common problems
Owners of the 2011 Mercedes-Benz S 550 filed 9 complaints with NHTSA, most often about fuel/propulsion system and electrical system. Details by component below, with sources.
Key figures
- Owner complaints
- 9
- involving a crash
- 1
What fails most often
- 1 Fuel/propulsion system 22% of all complaints
- 2 Electrical system 11% of all complaints
- 3 Engine 11% of all complaints
- 4 Exterior lighting 11% of all complaints
- 5 Forward collision avoidance 11% of all complaints
- 6 Structure 11% of all complaints
- 7 Suspension 11% of all complaints
- 8 Vehicle speed control 11% of all complaints
- Fuel/propulsion system: 2 complaints (22% of all).
- Electrical system: 1 complaints (11% of all).
- Engine: 1 complaints (11% of all).
- Exterior lighting: 1 complaints (11% of all).
- Forward collision avoidance: 1 complaints (11% of all).
Symptoms owners describe
How many of the 9 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) |
|---|---|---|---|
| Fuel/propulsion system | 2 | 0 | 0 |
| Electrical system | 1 | 0 | 0 |
| Engine | 1 | 0 | 0 |
| Exterior lighting | 1 | 0 | 0 |
| Forward collision avoidance | 1 | 0 | 0 |
| Structure | 1 | 0 | 0 |
| Suspension | 1 | 0 | 0 |
| Vehicle speed control | 1 | 0 | 0 |
| Other | 2 | 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.
The instrument cluster on my 2011 Mercedes-Benz S550 (W221) is locked by a persistent red âBattery Not Chargedâ warning message. This message appears even though the charging system is working correctly (normal charging voltage, new battery, and new battery sensor installed).
The contact's daughter owns a 2011 Mercedes-Benz S550. The contact stated that while the vehicle was parked in the garage, the contact noticed that the air suspension had collapsed. The dealer was notified of the failure and informed the contact that it was a known failure. The vehicle was not diagnosed or repaired.
FUEL SYSTEM, GASOLINE If the fuel filter flange cracks, it will leak fuel which may lead to a fire if an external ignition source is present. NHTSA CAMPAIGN ID Number: 12V557000
I am filing a complaint with your agency regarding a fuel pump malfunction with my 2011 Mercedes S550 (VIN# [XXX]), because I feel that the incident below is a major safety concern and is similarly situated to the following NHTSA Campaign #12V557000.
It had a warning message 'services required. Do not shift the gear'. We towed our car to the dealer and learned that the backseat flood had standing water! This caused the electronic shortage. We paid over $2000 to make the car running again.
The contact stated that the vehicle caught on fire while parked. The contact was able to extinguish the fire which started from underneath the vehicle. The vehicle was towed to an independent mechanic who determined that the engine harness leading to the oxygen sensor was the cause of the fire.
The rear of the vehicle rattled without warning. On another occasion, all the warning indicators failed to illuminate and the gps provided incorrect information. The vehicle was taken to a dealer, but they could not duplicate the failure. The vehicle was not repaired. The manufacturer was made aware of the failure.
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 11,368 of 36,659 model years in the NHTSA data (top 31% most complained about).
On average one model year of the S 550 has 16 complaints (13 years in the data). This year has 9, below average.
What to check before buying
- Fuel/propulsion 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.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Exterior lighting. Headlamps, leveling, sensors and mounts after a frontal hit.
Other years of this model
Questions and answers
What are the most common problems with the 2011 Mercedes-Benz S 550?
Owner complaints to NHTSA most often mention: fuel/propulsion system, electrical system, engine. Total complaints: 9. The most frequent symptoms in complaint texts: smoke, burning smell, fire (22%), warning lights, check engine (22%), driver assists: adaptive cruise, lane keeping (11%).
How many service bulletins (TSB) were issued for the 2011 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 2011 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 2011 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 2026-11-06.