2008 Mercedes Benz C300 brakes problems

Filed Aug 19, 2025 · Brakes · 164,000 miles · SC · crash

The contact owns a 2008 Mercedes-Benz C300. The contact stated that while depressing the brake pedal, attempting to stop, the vehicle failed to respond as intended and causing the contact to drive through a stop sign, then merge onto the interstate independently. The driver's side rear tire was leaking brake fluid. The check brake system warning light illuminated. The vehicle was towed to a dealer, where it was diagnosed that the brake line was corroded. The vehicle was repaired under warranty for the subframe prior to the failure; however, the brake lines were not covered and needed replacement. The vehicle was then towed to an independent mechanic where the brake lines were pending replacement; however, the mechanic was waiting for parts. The manufacturer was notified of the failure and offered no assistance. The approximate failure mileage was 164,000.

Filed Jul 27, 2025 · Brakes · MA

Certified Mercedes dealership confirmed that the subframe of my 2008 C300 is rusted and needs to be replaced which is under warranty. However, they are unwilling and do not acknowledge that the brake lines are also rusted and need to be replaced which is CAUSED by the rusted subframe. I first consulted my local mechanic shop who specializes in Mercedes repairs, and he told me about the issues of the corroding subframe and the rested brake lines. He also mentioned that he has helped and directed many Mercedes owners to call Mercedes customer service to voice my concerns as well as confirm the warranty of the subframe.

Filed Nov 20, 2024 · Brakes · MD

I honestly don’t know how Mercedes could have used such a cheap metal mix in their brake lines. Every single c300 made before 2012 is at extreme risk of brake failure every winter, the lines rust very easily and cause ruptures to happen as soon as you need to use your brakes in emergency. If you slam your foot on the brakes for a 2008-2009 Mercedes, you are putting your life at risk.

Filed Sep 4, 2023 · Brakes · GA

Brake Booster vacuum leak causing it to not brake properly. Requires more pedal pressure to come to a stop. Extremely dangerous

Filed May 24, 2022 · Brakes · MO

I was driving and the brake pedal went to the floor I managed to get the car in the garage and brake fluid leaked all over the floor Had the car towed to the dealer inspection show both stainless steel brake lines corroded in the same place Leaked out brake fluid end result was 5000 dollar repair bill

Filed Jan 7, 2022 · Brakes · PA

At only 59,000 miles, the brake lines of my Mercedes C300 suddenly developed a significant leak of brake fluid which caused the brake pedal to go all the way to the floor with minimum function. The car was immediately taken to the dealership where the service dept confirmed that all of the brake lines had become corroded and needed to be replaced. They also communicated that this was a common issue on these vehicles which I have further confirmed by identical complaints raised on the www.mbworld.org forum page. The manufacturer used faulty materials prone to premature corrosion and sudden failure for the brake lines on these vehicles which places drivers at a significant danger and safety risk. There should be an immediate recall of all of these vehicles to replace these defective brake lines subject to sudden failure at the expense of the manufacturer.

Filed Feb 26, 2018 · Brakes · 94,597 miles · NJ

This issue surfaced while driving and brakes where applied. Lost breaking due to corrosion perforating rear brake lines causing break fluid to leak and total loss of breaking. This is a 2008 c class 4matic sport where both rear brake lines feeding from the ABS module to the rear calipers were totally rusted and caused the car to loose all braking. Brake lines rusted mostly where they are attached to the frame under the car due to sub par quality of the metal used and moisture trapped between the bracket and the brake line. I own two other cars that are 22 years old with no rust on the brake lines and driven in the same exact environment as this mb c300. Repair cost at an independent shop ran $1600.

Filed Jan 27, 2016 · Brakes, Steering · 90,000 miles · LA

Tl* the contact owns a 2008 mercedes-benz c300. The contact stated that the remote key failed to start the vehicle. The brake pedal locked up, the steering wheel seized, and the gear shifter failed to come out of park. The instrument panel indicated to remove the key from the ignition switch. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The approximate failure mileage was 90,000.

Filed Aug 21, 2015 · Brakes, Fuel system · 65,000 miles · SC

My car did not respond when I tried to start and the steering was locked and I could not fire the ignition. I towed the vehicle to the nearest mercedes showroom and they said that the steering was locked and should be replaced which will cost me $1100. I have read couple of posts online and I see this is a known issue and it is really bad that mercedes did not fix this and not even taking care of the vehicles which are effected.

Filed Feb 20, 2015 · Acceleration, Body · 54,000 miles · PR · crash

Upon commencing my exit from the parking lot adjacent to my church, I pressed the accelerator and the vehicle bolted forward at full speed crashing through the parking lots fence and into a major avenue (where, fortunately no traffic was transiting at the moment). The vehicle failed to respond to my initial attempts to apply the brakes and it was not until the vehicle had traversed the four lane avenue and reached the sidewalk on the other side of the avenue that I was able to bring the vehicle under control and judiciously park same until a police accident report could be filed ([xxx]) and the vehicle towed away. Vehicle is now in a repair shop and estimated costs are approximately $10,000. Information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6).