Discovered a severely "rotted/rusted" rear subframe and one of the passenger side suspension/control arm of the rear passenger side wheel is completely "detached/disconnected" from the rear subframe. During a hard brake, the car will "swing/drift" to the right and is very dangerous and prone to accident/catastrophe. Also, many other 2008-2014 C300 owners already have reported/complaints over the internet. This defect needs to be recalled by the manufacturer. The contact was informed by a technician that the detached rear control arm may "puncture" the gas tank because of how close it is to it. The vehicle is not recommended to be driven until the repair is made.

- Bloomfield, NJ, USA

While my car was being inspected at the Mercedes dealer from who I purchased the car, I was informed that the rear subframe was rusting out, needed to be replaced immediately (at the cost of $4250) as it is unsafe to drive and that the result could be catastrophic if I continued to drive it. They explained that they are having this problem with other C300 models in the US, Canada and Germany, but there has not been a recall in the USA. They told me that it might be the road salt as this is only happening in the North East. If this were true than I would think other parts of the undercarriage would be rusted or this would occur in other models too. They are well aware of this issue but have neglected to contact owners therefore putting my life and the life of my family at risk. The NHTSA needs to investigate and recall these vehicles immediately before someone is killed. Seems to me they are using sub standard materials and while having knowledge of this issue, should be held accountable. Thank You.

- Bristol, PA, USA

Rear subframe of vehicle rusted under regular use conditions and the left trailing arm mount broke off as a result. This caused vehicle braking to become extremely unstable and dangerous, even at low/medium speed. This is a known problem from this manufacturer and the Fed government should take action to force recall.

- Lexington, KY, USA

The rear subframe on the car is completely rusted. I get an oil change and a inspection of the car done at the dealer each year. Nobody mentioned to me that the rear subframe is rusted and is about to crack and fall apart. Was driving home from work when I suddenly had to stop and the whole car shifted to the right almost causing me to crash. Drove home and noticed a noise every time I hit the brakes. The next day took it to a mechanic and he showed me that the subframe cracked and fell apart. I know this is a big issue in europe and the dealers change it free of charge since it is on a recall, but nothing in the usa after several complaints from drivers. Do something about this!

- Elmwood Park , IL, USA

While driving normal highway speed and braking suddenly the car violently pulls to left. Same occurs when driving normal city traffic. Good afternoon I am following up on a major safety issue #11453988 concerning a 2013 C300 Mercedes. I reported this a few weeks ago as this safety defect can cause personnel injury when the defective part fails. As noted earlier during normal braking the car pulls hard to left or right. With normal highway speed driving and emergency braking the car will violently pull left or right possibility into oncoming traffic and or fixed objects. Please reply with update into this major safety defect concern. PS the part number in question has been changed from number 2043500141 with new number 2073509702. This part is not available in the US currently and has a lead time of 30 days from Germany. With the long lead time and the need to travel to work it is a major safety issue that can be avoided. Thanks George

- Mahwah, NJ, USA

I-€™ve had 2 c300 Mercedes models in the past 8 months both used and were driving fine until rain water and car washes caused electrical damage there is a water leaking issue that goes into the floorbeds of the vehicle that causes the car to malfunction

- Rochester, NY, USA

The contact owns a 2013 Mercedes-Benz C300. The contact stated while driving 75 MPH, she started to hear an abnormal sound. The contact stated no warning light was illuminated. The contact continued driving to her residence however while depressing the brake pedal the vehicle was pulling to the left. The contact continued driving to her residence. The contact towed the vehicle to the local dealer to be diagnosed. The contact was informed that the driver-€™s side rear axle and brake line was corroded and needed to be replaced. The vehicle was not yet repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 99,800.

- Cincinnati, KY, USA

On 09-12-16 I was involved in a rear end collision (35+ mph). I was stopped in traffic (interstate highway). My vehicle was in eco mode and the vehicle's brake hold feature was activated, the brake was fully engaged/pressed, and hold was displayed on the forward instrument cluster. While stopped, another vehicle struck my vehicle from the rear. My vehicle's neck-pro retraint system activated and the hazards activated. No air bags were deployed. However, a few seconds after the accident, the brake hold feature deactivated and my vehicle began to roll into rush hour traffic. After actively pumping the brakes, to no avail, I initiated an offensive maneuver and swerved the vehicle off of the highway and onto unpaved side road/shoulder. My vehicle continued to roll forward and only stopped after I fully pressed/engaged the emergency brake. Is deactivating brake hold in a rear end collision a design flaw, or is this the intended function?

- Raleigh, NC, USA

The contact owns a 2013 Mercedes-Benz C300. While driving approximately 55 mph and attempting to stop the vehicle, the brake pedal traveled to the floor and the vehicle failed to stop. In order to stop the vehicle, the contact had to wait until the vehicle came to a stop and then turned off the vehicle. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 35,000.

- Dunn, NC, USA

The contact owns a 2013 Mercedes-Benz C300. While driving 10 mph, the vehicle independently accelerated. The contact attempted to stop the vehicle by depressing the brake pedal; however, the brakes failed and the vehicle crashed into a fence. The air bags failed to deploy. As a result, a police report was filed and there were no injuries. The vehicle was able to be driven from the scene. The manufacturer was not made aware of the failure. The approximate failure mileage was 38,000.

- Chicago, IL, USA

While making a right turn into a parking lot at low speed accelerator pedal not depressed the vehicle suddenly accelerated. When brakes were depressed they failed and did not stop nor slow the vehicle. Car crashed into the building. Air bags additionally did not deploy as car hit building in corner at center of front. Minor injury to driver from seat belt restraint.

- Ringgold, GA, USA