AI Damage2006 Mercedes-Benz SLK350: common problems
Owners of the 2006 Mercedes-Benz SLK350 filed 10 complaints with NHTSA, most often about powertrain and engine. Details by component below, with sources.
Key figures
- Owner complaints
- 10
- involving a crash
- 1
What fails most often
- 1 Powertrain 50% of all complaints
- 2 Engine 20% of all complaints
- 3 Vehicle speed control 20% of all complaints
- 4 Air bags 10% of all complaints
- 5 Electrical system 10% of all complaints
- 6 Exterior lighting 10% of all complaints
- 7 Structure 10% of all complaints
- 8 Visibility 10% of all complaints
- Powertrain: 5 complaints (50% of all).
- Engine: 2 complaints (20% of all).
- Vehicle speed control: 2 complaints (20% of all), 1 of them with a crash reported by the owner.
- Air bags: 1 complaints (10% of all).
- Electrical system: 1 complaints (10% of all).
Symptoms owners describe
How many of the 10 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) |
|---|---|---|---|
| Powertrain | 5 | 0 | 0 |
| Engine | 2 | 0 | 0 |
| Vehicle speed control | 2 | 1 | 0 |
| Air bags | 1 | 0 | 0 |
| Electrical system | 1 | 0 | 0 |
| Exterior lighting | 1 | 0 | 0 |
| Structure | 1 | 0 | 0 |
| Visibility | 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 contact depressed the brake pedal and heard a loud grinding noise. There was a sudden increase in rpm's and the vehicle continued to accelerate, which caused him to crash. There were no warning indicators illuminated prior to the failure.
Back frame is extremely rusted. My whole wheel could have come off which would have been extremely serious. My car only has 46000 miles and garage kept. No warning signs. I don't drive in wintry conditions. My car has only been inspected by the service mechanic and myself.
Tl* the contact owns a 2006 mercedes-benz slk350. On several occasions, while the contact's daughter was driving, the headlamps became inoperable. The contact stated that the wiring harness to the headlamps melted and left the wires exposed. A dealer was not contacted. The manufacturer was made aware of the failure.
Tl* the contact owns a 2006 mercedes-benz slk350. The contact stated that the vehicle experienced a lack of engine power after accelerating from a complete stop. The contact stated that the vehicle had to be manually restarted to be operated normally. The failure occurred without warning.
The odd thing is the code kicked in at 61400 miles & the light came on 2000 miles later. The extended warranty company refused to fix my car under the warranty I purchased due the "data freeze' showing problem existed prior to me purchasing that warranty but I was unaware of that since the engine light didn't come on…
But as soon as I reached home with the car there was a check engine light . My house is 140miles from the dealer ship . I called them the very next day , they called me in the next week , kept the car for 4 days . Again when I took the car from them they say everything works fine .
Severe jerk as vehicle decelerated around 10-12 mph. Took vehicle to dealership and test drove with technician who verified the problem. There were no warning lights or codes found. I was notified by the dealership that there was a snap ring failure within the gear box.
552(b)(6) 30 apr 10 - 2006 mercedes benz slk350; the vehicle has 31,000 miles on it and recently had to take the vehicle back to the dealer for a left rear turn signal light out. Had service done under warranty and also had brakes and front rotors replaced.
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 10,921 of 36,656 model years in the NHTSA data (top 30% most complained about).
On average one model year of the SLK350 has 8 complaints (8 years in the data). This year has 10, above average.
What to check before buying
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Vehicle speed control. Accelerator pedal, cruise control, throttle codes.
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
Other years of this model
Questions and answers
What are the most common problems with the 2006 Mercedes-Benz SLK350?
Owner complaints to NHTSA most often mention: powertrain, engine, vehicle speed control. Total complaints: 10. The most frequent symptoms in complaint texts: warning lights, check engine (30%), jerking, harsh shifts (10%), headlights and tail lights (10%).
How many service bulletins (TSB) were issued for the 2006 Mercedes-Benz SLK350?
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 SLK350 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.