2010 Mercedes-Benz C300 body problems

Filed Aug 7, 2025 · Airbags, Body · MD

While i have a few recalls i plan on needing service from Mercedes for, I just found out that Mercedes has a Class action lawsuit involving my C class mercedes C300 from 2010-2022 years. I was driving and ran into a pothole. My car rear started making noise and sounds. I went to the auto shop amd was told my rear subframe was damaged and would cost over 2,000. I and putting in a complaint to make sure Mercedes honor this recall/ extended warranty for my vehicle.

Filed Jan 31, 2025 · Body, Suspension · 63,000 miles · NY

The contact owns a 2010 Mercedes-Benz C300W. The vehicle was taken to the dealer for an alignment. The contact was later informed that the wheel alignment was not fully completed due to extensive corrosion on the subframe. The contact picked up the vehicle and upon investigation discovered that there was a warranty on the vehicle for the corrosion of the subframe. An appointment was scheduled, and the vehicle was taken to the dealer where it remained for two weeks. The contact was later informed that the condition of the vehicle did not reach the warranty standards for repair. The vehicle remained in the possession of the dealer unrepaired. The manufacturer was notified of the failure and the contact was informed that dealers were independently owned and made their own decisions on warranty repairs. The failure mileage was approximately 63,000.

Filed Jul 18, 2023 · Body · 75,000 miles · NY

The contact owns a 2010 Mercedes-Benz C300. The contact stated while driving at an undisclosed speed and attempting to make a left turn, the brake pedal was depressed, and the vehicle drifted farther to the left than intended. No warning lights were illuminated. The vehicle was taken to an independent mechanic, who observed abnormal deterioration of the sub frame. The vehicle was later taken to the dealer, but the vehicle was not yet diagnosed. The vehicle was not repaired. The contact investigated and related the failure to Manufacturer Communication the federal safety agency ID Number: 10233780 (Structure, Equipment). The manufacturer was not notified of the failure. The failure mileage was 75,000.

Filed Aug 25, 2022 · Body, Steering · OH

Rear subframe completely rusted through resulting in multiple attached systems to break off. When applying the brakes the rear end of the vehicle swings and can force the car into random directions. Upon any basic research this issue can be seen in similar Mercedes models across the globe consistently. If the issue was not diagnosed sooner the likelihood of a fatal crash would have been extremely high due to critical components like braking and suspension systems being nonfunctional. Many vehicles that experience this design flaw are well maintained and kept in good conditions. I urge the federal safety agency to release some kind of warning to owners of these vehicles because this issue can blindside even the most vigilant owners. Many posts regarding this issue describe nearly avoiding severe accidents. Please do not let this go unheard because it can be fatal if not addressed.

Filed Aug 24, 2022 · Body · CT

I need to have my rear brake lines replaced they are blown out but they need to remove the subframe in order to complete the job. They discovered that the subframe is completely rotted and has a hole in it and they believe if they remove it the subframe will break and need to be replaced. They indicated this was a big safety issue and is a known issue on the Mercedes. I was lucky I did not kill myself driving this vehicle. It did come up with warning lamps for the brakes and I contacted the dealership and had it towed there, that's when they discovered the rotted subframe.

Filed Jul 1, 2022 · Body, Suspension · VA

The dealer noticed that the rear suspension subframe had rusted and corroded with a hole. They rejected the passage of the state safety check. A review of online forums shows this is a common problem in these years and Canadian and German counterparts of MBUSA have issued recalls because a third party supplier provided the parts without sufficient corrosion protection. See eg. https://mbworld.org/forums/c-class-w204/805501-rotted-rear-subframe.html

Filed Jun 21, 2022 · Body · OH

Rear subframe corrosion hast rusted through and the subframe is no longer attached to the lower control arm car has only 56k miles this has been recalled in Canada and the issue needs to be addressed in the us it is a safety issue

Filed Jun 15, 2022 · Body · MA

Corrosion of sub frame. Vehicle is available for inspection upon request. June 7, 2022 Viti service advisor reports rust hole in sub frame. Putting the safety of myself and family members at risk. Due to corrosion deteriorating the structural integrity of the sub frame. Sub frame could break causing catastrophic accident. Loss of control, rollover, fire, puncture fuel tank, etc. This appears to be a well known defect and is recalled in Canada. Vehicle was purchased and serviced at Viti from 2010 to present. Garaged. Vehicle has not been inspected by police, insurance presentative or others. There were no warning lamps, messages or other symptoms of the problem prior to the failure.

Filed May 20, 2022 · Body · MA

I brought my car into the dealer to have my annual state required inspection, and was told by the dealer that the rear subframe had severe rot and corrosion, to an extent that they would not allow the car to pass inspection as it was hazardous to drive, and if the subframe cracked, for instance, by driving over a bump or pothole, I would endanger myself, passengers, and other cars on the road. I was stunned to find out that my Mercedes, a premium automobile, by a marquee manufacturer, which has a reputation for engineering/manufacturing excellence and had such significant corrosion. I was equally stunned because I have consistently maintained my car and done all the recommended maintenance. I asked the dealer service manager to hoist the car on a lift so I could inspect and verify the corrosion on the subframe. While I saw the significant corrosion on the subframe, all other parts of the underside of the car were in excellent shape and drive-able condition. This leads me to believe that there is a design/manufacturing flaw in the subframe. I researched this issue online and discovered that this exact Mercedes subframe has been recalled in other countries, but not in the U.S. It is a known and dangerous defect, Mercedes clearly knows it's a dangerous defect, and yet they have not recalled it. This has put me, my family, passengers and potentially other drivers at risk of serious harm and injury had the subframe broke while being driven. Additionally, it unfairly shifts the burden of repair onto the consumer rather than Mercedes for fixing a known and dangerous defect. Does a tragedy need to occur before this defective part is recalled? I hope not.

Filed May 10, 2022 · Body · MD

The rear sub-frame of my car has almost rusted in half. While driving on 95 I had to brake rather quickly and it felt as if the whole car was twisting. I called my mechanic the next day, drove in and put it on the lift only to find out that the sub-frame was almost detached from the car. Had this happened at 70 MPH it could have been disastrous. Mercedes knows about the design flaw but refuses to take any action.