2011 Mercedes-Benz C300 Engine cooling Problems
- Complaints
- 1about this part
- Share
- 0%of 480 total for the year
- Median mileage
- 4,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine cooling of the 2011 Mercedes-Benz C300, 0% of the 480 complaints for this model year. Where a mileage was given, the median is 4,000 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.
“I bought this car new in 2011. After a couple of months, started noticing a rotten egg odor coming from my car. The smell seems to come from underneath the car. Usually occurs when I'm going 45mph or more going up a hill on a highway. Took it to the dealer to check, so they took the car for a test drive and said they found no odors which I don't understand why? They said it might be the type of fuel I use for the car may affect it, but I use premium gas only from chevron. Mercedes really need to look into this, because the smell is horrible! …”
NHTSA complaint #10608253, filed 2014-07, 4,000 milesRelated service bulletins
- 10205790Aug 2, 2021After starting the engine, the instrument cluster shows the "EBD not available, diagnosis/test stand" message in yellow.
- 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.
- 10044201Apr 5, 2012Xentry: mercedes benz: vehicle does not perform automatic engine stop although the eco function was activated via the eco button. No model years given. Also included model 169…
Engine cooling: other model years
Other parts of the 2011 Mercedes-Benz C300
250 complaintsSuspension
60 complaintsBody and structure
49 complaintsFuel system
44 complaintsElectrical system
43 complaintsSteering
34 complaintsOther or unknown
33 complaintsExterior lighting
20 complaintsBrakes
13 complaintsEngine
10 complaintsTransmission and drivetrain
10 complaintsSeats
4 complaints
← All problems reported for the 2011 Mercedes-Benz C300
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