2009 Mercedes-Benz C300 Body and structure Problems
- Complaints
- 27about this part
- Share
- 5%of 576 total for the year
- Median mileage
- 92,100miles
- Trend
- FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
NHTSA recorded 27 complaints about the body and structure of the 2009 Mercedes-Benz C300, 5% of the 576 complaints for this model year. Where a mileage was given, the median is 92,100 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.
“Bought C300 2009 4 matic sep. 2017 used from a dealer. Carfax indicates getting scheduled service from dealer and it does not show problems with the car. It has now 90k mileage. Lately, I started hearing some noise at the back whenever I hit a small bump, so I decided to bring it to the Mercedes-Benz dealer and have it checked last july 21, 2020. They found out that the rear subframe is broken because of rust. The estimated repair cost is $6,000. …”
NHTSA complaint #11343806, filed 2020-08, 90,000 miles“My rear sub frame is broken due to rust on my 2009 mercedes C300. It was causing major wiggle while breaking and I thought it was the rotors. The car has 98,000 miles on it and has always been stored dry in my garage. Upon looking online, it appears this has been a problem with numbers mercedes c classes upon 90,000 - 100,000 miles. When I took it to the shop for them to look at the rotors, they were surprised it didn't completely break and cause a wreck. They are having me tow it to a body shop.”
NHTSA complaint #11343169, filed 2020-08, 98,000 miles“Takata recall I was driving to work around 10:30 am in my 2009 mercedes benz C300 enjoying the commute. As I approached the stop light.....blank!!!! I lastly remember breaking ....to open my watering eyes to see that I hit another vehicle and don't recall anything at all. As I get up in realized that my head hurts and there was a small tear in the steering wheel as a small portion of the bag deployed but not fully.. It appeared to be a faulty bag that has caused this serious inconvenience.”
NHTSA complaint #10874282, filed 2016-06, 112,000 miles“Driver's side interior door-opening latch/handle has disengaged so that I cannot open the door to exit the vehicle. In order to open the door, I must open the window and reach outside the vehicle to engage the exterior door latch/handle. This is time-consuming and could be quite dangerous should I need to exit the vehicle quickly. It happened suddenly after I had returned home and parked. I was about to exit and the latch just gave up when I tried to engage it. I found similar complaints online with owners stating that the interior door latch/handle (inner part) is made of very cheap plastic.”
NHTSA complaint #10956846, filed 2017-02, 56,011 miles“Take my car to the dealer and told me my rear subframe is rusted out and is dangerous to drive. Total cost replace they said around $5800 . Why there isn’t recall for the problem in the USA ? I find out there is one in Canada and Germany for this car. What I’m supposed to do with the car? Take it to a junkyard because Mercedes’”
NHTSA complaint #11473026, filed 2022-07Related 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…
- 10037988Dec 8, 2010Mercedes-benz: on rough roads there is a knocking noise in the liftgate area. The stop buffers are too hard and are creating the noise during vibration.
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 2009 Mercedes-Benz C300
198 complaintsAir bags
182 complaintsSteering
136 complaintsExterior lighting
118 complaintsSuspension
36 complaintsOther or unknown
31 complaintsBrakes
21 complaintsElectronic stability control
20 complaintsEngine
16 complaintsTires
9 complaintsSeat belts
8 complaintsVehicle speed control
8 complaints
← All problems reported for the 2009 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