2009 Mercedes Benz C300: harsh or hard shifting

Filed Jul 13, 2022 · Body, Suspension · 190,000 miles · ME

The contact owns a 2009 Mercedes-Benz C300. The contact stated while driving 70 MPH, he heard an abnormal clunking sound coming from the rear of the vehicle. The contact veered to the side of the road. After looking under the vehicle, the contact noticed that the subframe located next to the gas tank was fractured. The vehicle was taken to an independent mechanic where it was diagnosed that the rear subframe had fractured from the weld point. However, the parts to do the repair were not available. The vehicle was not repaired. The dealer was not notified of the failure. The manufacturer was notified of the failure and referred the contact to the dealer. The failure mileage was approximately 190,000.

Filed Apr 16, 2021 · Suspension · 128,430 miles · VA

Im the owner of a 2009 mercedes-benz c300 4matic sport, which was purchased in 2019. The vehicle currently has about 128,000 miles. It was taken to a local mechanic for inspection and after hearing some clunking noises, especially when braking or turning, they discovered rust, corrosion, and cracking to the rear subframe. Upon further research, it has been discovered that this is a known problem, especially for this year and model of mercedes. There are many other owners who have complaints online about the same problem. The rear subframe corrosion is estimated to cost about $2500 to repair at local mb dealership. This is a known and comon problem. The car has become a huge safety issue. With so many known cases and obvious safety concerns, mb should resolve this defect and place it under recall. Many owners may not even know they have this problem. Driving a vehicle in this condition could potentially cause injury or fatality to the driver, passengers, and others on the road. I’ve been advised to request a goodwill repair, since there is no recall. Mb should be found responsible for this repair. I’m contacting the federal safety agency to file an official vehicle safety complaint in hopes that the recall process is started and an order is placed to the manufacturer to issue a recall.

Filed Dec 2, 2020 · Suspension · 60,422 miles · PA

I'm the owner of a 2009 mercedes-benz c300 4matic sport, which was purchased in 2012 from a mercedes dealer. The vehicle currently has about 60,400 miles. It was taken to a local mechanic for inspection and after hearing some clunking noises, especially when braking or turning, they discovered rust, corrosion, and cracking to the rear subframe. Upon further research, it has been discovered that this is a known problem, especially for this year and model of mercedes. There are many other owners posting complaints online about the same problem. The rear subframe corrosion is estimated to cost about $3-4k to repair. The local mb dealer revealed they are actually repairing a car with this same problem, as we speak. Another call to mb for part pricing indicated this is a common, known problem. The car does not pass inspection and has become a huge safety issue. With so many known cases and obvious safety concerns, mb should resolve this defect and place it under recall. Many owners may not even know they have this problem. Driving a vehicle in this condition could potentially cause injury or fatality to the driver, passengers, and others on the road. I've been advised to request a goodwill repair, since there is no recall. I was told by mb that I need to schedule an appointment for an official diagnosis and repair estimate at my local mb dealer ($179) before I can move forward with the request for the goodwill repair. Many other owners have received denials to their requests, which is very disappointing. Mb should be found at fault for this defect and keep the safety of their consumers as their top priority. It will likely take a week or two before I receive a determination for my goodwill request, but I'm contacting the federal safety agency to file an official vehicle safety complaint in hopes that the recall process is started and an order is placed to the manufacturer to issue a recall.

Filed May 9, 2019 · Suspension · 92,000 miles · MN

Rear sub-frame corrosion issue. Starting hearing clunking noises coming from rear right of the vehicle. Also noticed the car seemed to pull or twist to the right when braking. I inspected the brakes, all 4 disc brakes and parking brakes looked fine, noticed sub-frame rust through. This level of corrosion on a key structural component is dangerous. It seemed obvious to me this was a manufacturing issue. The car is in excellent condition no other corrosion issues, and has been well maintained and keep in a heated garage since we purchased it 6 yrs ago. We took it to the mercedes dealership, had them confirm the issue, and registered a request to mercedes corporate to help fix this issue. They denied that request. The local service dept. Indicated how dangerous this issue is and the car should not be driven. The cost to fix this =$2600.

Filed Apr 1, 2019 · Suspension · MA

Bought this car from original owner- never seen a mass winter -the car's rear end is swaying and making clunking noise- just brought the car into a mechanic - the rear sub frame is broken in two parts- one is near the gas tank- vehicle not save to drive- car has 80.000 miles on it and it was purchased in 2015 with 52,000 miles on it- this car was purchased because it was a safe car - plenty of airbags with pelvic air bags especially- my gf was in a very bad car accident and had a broken pelvis which is the main reason she bought this car- she still has a year left of making payments on it.