2009 Mercedes-Benz C63 Engine cooling Problems
- Complaints
- 1about this part
- Share
- 8%of 12 total for the year
- Median mileage
- 42,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine cooling of the 2009 Mercedes-Benz C63, 8% of the 12 complaints for this model year. Where a mileage was given, the median is 42,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“As I was driving I had a light come on my dash telling me I had low coolant and that I needed to have it filled. This has happened a number of times since my short ownership of this vehicle. From what I understand this is a sealed unit and should not be losing antifreeze anywhere. I had the vehicle looked at and I do not have any leaks whatsoever. When I add the coolant, it seems to be fairly low. I am concerned that I may have some big issues on my hands and could potentially have a hydro-locking of the engine problem creating a major safety issue leading to a crash. …”
NHTSA complaint #10582929, filed 2014-04, 42,000 milesRelated service bulletins
- 10205790Aug 2, 2021After starting the engine, the instrument cluster shows the "EBD not available, diagnosis/test stand" message in yellow.
- 10162209May 31, 2019C63/GTx 177/178 Check Engine Light on with Misfire DTC's. Engine Running Roughly
- 10144075Mar 12, 2018Check Engine Light is on with DTC P030185/ P030685 for misfire cylinder 1 and 6.
- 10166978Feb 6, 2014Engine diagnosis warning lamp lights up - Fault code entry (FC) 14A600 or 14A700
- 10167554Jul 10, 2013Engine diagnosis warning lamp activated. Fault code P045600 "Very fine leak" or P044200 "Fine leak" stored in engine control unit.
- 10039256May 31, 2011Mercedes-benz: the malfunction light is on with multiple possible trouble codes stored. There could be a problem with the camshaft and/or scoring of a piston.
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2009 | 1 | 8% |
Other parts of the 2009 Mercedes-Benz C63
4 complaintsElectrical system
4 complaintsEngine
2 complaintsExterior lighting
2 complaintsBrakes
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints
← All problems reported for the 2009 Mercedes-Benz C63
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology