AI Damage2006 Mercedes-Benz CLS 550: common problems
Owners of the 2006 Mercedes-Benz CLS 550 filed 7 complaints with NHTSA, most often about service brakes and fuel/propulsion system. Details by component below, with sources.
Key figures
- Owner complaints
- 7
What fails most often
- 1 Service brakes 57% of all complaints
- 2 Fuel/propulsion system 43% of all complaints
- 3 Electrical system 14% of all complaints
- 4 Forward collision avoidance 14% of all complaints
- 5 Suspension 14% of all complaints
- 6 Wheels 14% of all complaints
- Service brakes: 4 complaints (57% of all).
- Fuel/propulsion system: 3 complaints (43% of all).
- Electrical system: 1 complaints (14% of all).
- Forward collision avoidance: 1 complaints (14% of all).
- Suspension: 1 complaints (14% of all).
Symptoms owners describe
How many of the 7 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) |
|---|---|---|---|
| Service brakes | 4 | 0 | 0 |
| Fuel/propulsion system | 3 | 0 | 0 |
| Electrical system | 1 | 0 | 0 |
| Forward collision avoidance | 1 | 0 | 0 |
| Suspension | 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.
While driving the vehicle SBC warning light came on and the vehicle slowed canceling acceleration and braking causing the vehicle to limp while in traffic. This is the second occurrence of this issue the first only causing a loss of acceleration.
Fuel/propulsion system failed during operation on X-Way. Squeaking noise front suspension. Wheel rims cracking. Replacement key fob not working.
What happens is all of a sudden a warning light comes on and this message all in bright red saying, âBrake malfunction. Ineffective braking,ââ Stepping on the brake, my foot was going down to the floor pretty easily. No resistance, no brakes.
No notice Brake Failure. Coming up to the corner of my sub-division before making a right turn onto a busy 4 lane road, Stepped on the brakes and nothing happened ! Swerved to the left to avoid hitting a jeep that was stopped in front of me also waiting for traffic to clear enough to make the right turn.
Smells like gas inside the car after filling up with fuel. Only smells inside the car and is very strong.
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 12,538 of 36,656 model years in the NHTSA data (top 34% most complained about).
On average one model year of the CLS 550 has 8 complaints (13 years in the data). This year has 7, about average.
What to check before buying
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
- 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.
- Forward collision avoidance. Radar and camera: calibration after bumper or windshield replacement.
Other years of this model
Questions and answers
What are the most common problems with the 2006 Mercedes-Benz CLS 550?
Owner complaints to NHTSA most often mention: service brakes, fuel/propulsion system, electrical system. Total complaints: 7. The most frequent symptoms in complaint texts: brake failure (43%), warning lights, check engine (29%), smoke, burning smell, fire (14%).
How many service bulletins (TSB) were issued for the 2006 Mercedes-Benz CLS 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 2006 Mercedes-Benz CLS 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 2006 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.