AI Damage2005 Mercedes-Benz SLK: common problems
Owners of the 2005 Mercedes-Benz SLK filed 6 complaints with NHTSA, most often about powertrain and engine and cooling. Details by component below, with sources.
Key figures
- Owner complaints
- 6
- involving a crash
- 1
What fails most often
- 1 Powertrain 67% of all complaints
- 2 Engine and cooling 50% of all complaints
- 3 Service brakes 17% of all complaints
- Powertrain: 4 complaints (67% of all).
- Engine and cooling: 3 complaints (50% of all).
- Service brakes: 1 complaints (17% of all), 1 of them with a crash reported by the owner.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 3.5 L · petrol · 6 cyl
- 5.4 L · petrol · 8 cyl
- automatic, 7-speed
- manual, 6-speednamed in 1 complaints
Drive: RWD
Symptoms owners describe
How many of the 6 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 | 4 | 0 | 0 |
| Engine and cooling | 3 | 0 | 0 |
| Service brakes | 1 | 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.
Car continues to roll at stop light after I apply pressure to brake to stop car. Must stop car further away from car in front to prevent possible contact.
Took my car in, it would not go into reverse, then the engine was winding out really hi on the tachometer, mercedes said it was the valve body module in transmission, ok- then they told me my engine balance shaft was not working and the labor was 5628.00 they have not yet quoted me a price on the parts for either…
[xxx] 2005 slk 350 I have a manual transmission it is hard to get into first gear from neutral where it slips into reverse. The dealer has not so far been able to duplicate this. I found online that there is a tsb on this. They say unless the can duplicate this they will not proceed with it.
The vehicle has stalled a total of three times. The dealership has been alerted and replaced the transmission control module etc on may 16th, the problem returned on may 27, 2006. The dealership has been unable to successfully correct the problem.
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 13,281 of 36,659 model years in the NHTSA data (top 36% most complained about).
On average one model year of the SLK has 8 complaints (9 years in the data). This year has 6, below average.
What to check before buying
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
Other years of this model
Questions and answers
What are the most common problems with the 2005 Mercedes-Benz SLK?
Owner complaints to NHTSA most often mention: powertrain, engine and cooling, service brakes. Total complaints: 6. The most frequent symptoms in complaint texts: oil leak or consumption (17%), stalls while driving (17%).
How many service bulletins (TSB) were issued for the 2005 Mercedes-Benz SLK?
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 2005 Mercedes-Benz SLK 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 2005 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.