Subframe/mounting Bracket Problems of Mercedes Benz C300

The contact owns a 2012 mercedes-benz C300. The contact stated while driving 35 mph, the contact heard an unusual noise coming from the rear of the vehicle. The vehicle was taken to the dealer, and the mechanic stated that the rear subframe was rusted and the passenger’s side rear control arm was detached from the subframe. The vehicle was repaired. The manufacturer was contacted and stated there was no recall for the failure. No other assistance was offered. The failure mileage was 43,960.

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The contact owns a 2009 mercedes-benz C300. The contact stated that while her husband was driving at an undisclosed speed, the vehicle swayed on the roadways. The vehicle was taken to an independent mechanic who diagnosed that the rear subframe was corroded and needed to be replaced. The mechanic contacted the dealer to order the replacement part and was informed by the dealer that there was a recall for the subframe; however, the VIN was not included. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 70,000.

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The contact owns a 2010 mercedes-benz C300. The contact stated that their wife was driving approximately 60 mph when there was a strange noise coming from the vehicle as well as a shaking sensation. The driver pulled over to the side of the road where the vehicle was towed to their place of work. The vehicle was inspected by the tow truck mechanic who stated that the rear-sub frame had severe rust and was the cause of the failure. The contact had not been taken to the dealer. The vehicle had not been diagnosed or repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 90,000.

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The contact owns a 2013 mercedes-benz C300. The contact stated while driving approximately 30 mph, the steering wheel started shaking. The contact then depressed the brake pedal causing the vehicle to drift. There were no warning lights illuminated. The contact took the vehicle to the dealer who diagnosed that the rear-subframe was severely rusted causing a control link to fracture. The contact was informed that the control link and subframe needed to be replaced on the passenger’s side of the vehicle. The vehicle had not been repaired due to the parts being on backorder. The manufacturer was not made aware of the failure. The approximate failure mileage was 120,000.

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2013 Mercedes Benz C300. Consumer writes in regard to a hazardous defect in the rear subframe.

The contact owns a 2013 mercedes-benz C300. The contact stated that while driving approximately 55 mph when they attempted to apply the brakes the vehicle failed to stop and emitted a rumbling noise. The contact stated the vehicle's rear end had swerved causing them to use excessive force in order to avoid a crash. The contact was able to maneuver the vehicle to the side of the road where they waited before continuing driving. There were no warning lights. The contact took the vehicle to the dealer who diagnosed tat the rear sub frame on the left hand side had severe rust and needed to be replaced. The vehicle had not been repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 118,000.

The contact owns a 2012 mercedes-benz C300. The contact stated while driving approximately 15-20 mph, there was a rattling noise heard and the vehicle was pulling to the right. The vehicle was taken to the dealer and diagnosed that the rear subframe was rusted and had fractured. The vehicle was not repaired and remained at the dealer. The manufacturer was made aware of the failure and opened a case. The contact was awaiting a call back from the case manager. The failure mileage was approximately 120,000.

The contact owns a 2012 mercedes-benz C300. The contact stated that while driving at various speeds, the vehicle would drift from center in either direction without warning. After describing the symptoms to an independent mechanic, he was informed that rear subframe might be corroded. Upon inspection, the contact discovered that the subframe had started to corrode which had caused the failure. The dealer was notified of the failure and informed him that they are aware of the failure however, there was no recall regarding the issue. The contact attempted to notify the manufacturer of the failure but was unsuccessful. The vehicle was not repaired. The failure mileage was approximately 80,000.