2011 Mercedes-Benz C300 Body and structure Problems
- Complaints
- 49about this part
- Share
- 10%of 480 total for the year
- Median mileage
- 105,000miles
- Trend
- FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
NHTSA recorded 49 complaints about the body and structure of the 2011 Mercedes-Benz C300, 10% of the 480 complaints for this model year. Where a mileage was given, the median is 105,000 miles. 1 of these say a crash was involved, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I recently noticed a noise coming from the left rear side os the car when I would go over the slightest bumps. I was scheduled to have my breaks replaced and when the auto was on the lift, the mechanic noticed that the frame was cracked. The auto has never been involved in any serious accidents. I did some searching on Mercedes Benz forums and there are several references of similar occurrences. Those reporting the issue after visiting a dealer have hinted it's a known issue and caused by Winter weather. …”
NHTSA complaint #11468378, filed 2022-06, 158,000 miles“Rear suspension control arm rusts off of the subframe. No other rust on the car. During braking the car steers hard to the right almost causing an accident”
NHTSA complaint #11340814, filed 2020-07, 105,000 miles“The passenger side of the car got flooded with water. The dealership found that the leak was from the right side sunroof drain and that they would have to remove the headliner and passenger side interior carpeting to access the affected areas. The $795 estimate ballooned to $1600 when they said that the seating would have to be removed to remove the entire carpet because there was more water that had gotten into the car than they originally thought! This sounds like a design defect in this vehicle! This could be dangerous with the electric power and heated seats!”
NHTSA complaint #10679956, filed 2015-01, 35,000 miles“Had to replace the rear sub frame due to extensive rust and erosion. Major safety concern. This was brought to my attention at a routine maintenance service appointment. Almost as is they knew they should be looking for this problem. We are the only owners of this car. It is a garage parked car. No rust elsewhere just at the welded connection on the rear sub frame.”
NHTSA complaint #11486722, filed 2022-09“08/15/2022 (date statement was wrote not date of incident) While driving into work at 50 miles an hour, traffic started to slow. While applying brake heard loud pop and vehicle rear end lounged right making steering difficult, I immediately released the brake and control came back I then gently applied the brake again to slow vehicle and felt slight clump from rear. …”
NHTSA complaint #11479472, filed 2022-08Related service bulletins
- 11038217Sep 14, 2026Complaint Clanking noise from the area of the speakers in the doors. Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. • If the noise…
- 11036101Aug 6, 2026Complaint Clanking noise from the area of the speakers in the doors. Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. • If the noise…
- 11009122Oct 23, 2024Complaint Washer fluid system leaks Cause Various possible causes: 1. Washer fluid reservoir itself. 2. Seal on washer fluid pump/washer fluid reservoir. 3. Washer fluid pump…
- 10252770Mar 12, 2024As previously reported, to enhance the satisfaction of our customers, avoid further costs of litigation and return focus to its core businesses, Mercedes-Benz USA, LLC (MBUSA)…
- 10233780Mar 10, 2023Mercedes-Benz USA, LLC (MBUSA) has extended the warranty for the rear subframe on the vehicles listed below, from the original New Vehicle Limited Warranty of 4 years/50,000…
- 10232321Feb 10, 2023Mercedes-Benz USA, LLC (MBUSA) has extended the warranty for the rear subframe on the vehicles listed below, from the original New Vehicle Limited Warranty of 4 years/50,000…
- 10167038Feb 1, 2014This Service Campaign has been initiated because Daimler AG (DAG), manufacturer of Mercedes-Benz vehicles, has determined that the seam seal at the spare tire well may not be to…
Body and structure: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2023 | 1 | 5% |
| 2022 | 1 | 4% |
| 2020 | 4 | 12% |
| 2019 | 7 | 10% |
| 2018 | 14 | 14% |
| 2017 | 24 | 11% |
| 2016 | 28 | 10% |
| 2015 | 60 | 16% |
| 2014 | 9 | 10% |
| 2013 | 58 | 22% |
| 2012 | 55 | 21% |
| 2011 | 49 | 10% |
| 2010 | 34 | 8% |
| 2009 | 27 | 5% |
| 2008 | 9 | 1% |
Other parts of the 2011 Mercedes-Benz C300
250 complaintsSuspension
60 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 complaintsVehicle speed control
3 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