Mercedes-Benz CLK63: problems, complaints, bulletins
Summary for the Mercedes-Benz CLK63 across 1 model years: 3 owner complaints and 0 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
| Year | Owner complaints | involving a crash | Technical service bulletins (TSB) | YouTube repair videos |
|---|---|---|---|---|
| 2007 | 3 | 0 | 0 | 0 |
What fails most often
- Fuel/propulsion system: 3 complaints (100% of all).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Fuel/propulsion system | 3 | 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.
My service advisor looked at, and pronounced my fuel pump and gasket as being the culprits. A separate review by a subsequent advisor said the same. The smell is so strong as to be an embarrassment (at least) for what is otherwise a super car with only 65000 miles on it.
When the gas tank is filled up fuel is leaking from the top of the tank. After the car is driven and a few gallons of fuel are burned, the smell is no longer noticeable. The repair facility said the fuel sending unit and need to be replaced.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
What to check before buying
- Fuel/propulsion system. Fuel smell, leaks, rough running, fuel-system codes.
Other models of this make
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.