2009 MERCEDES-BENZ C300 Complaints

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.

The contact owns a 2009 Mercedes-Benz C300. The contact stated that she had experienced several electrical failures with the vehicle including the power seat and power windows, the parking brake, the exterior lighting, and the air bag warning lights. The contact also stated that the vehicle would lose motive power and stall while driving at various speeds with several unknown warning lights illuminated. The dealer was notified of the failure but offered no assistance. Upon investigation, the contact linked that failure to NHTSA Campaign Number: 22V168000 (Exterior Lighting, Electronic Stability Control, Engine and Engine Cooling). The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 120,000.

Take my car to the dealer and told me my rear subframe is rusted out and is dangerous to drive. Total cost replace they said around $5800 . Why there isn’t recall for the problem in the USA ? I find out there is one in Canada and Germany for this car. What I’m supposed to do with the car? Take it to a junkyard because Mercedes’

Rear subframe rusted through near connection with control arm. This left the rear wheel connected to the rest of the car only through an axle and sway bar. This is a very common issue on these vehicles, and was remedied through the replacement of the subframe.

I noticed my right tail light has completely went out and related damage to the brown wire connected to the entire casing. Per recall campaign: 2014050001; NHTSA RECALL NUMBER: 14V177, "Oxidation on the ground pin connector for the rear tail lamps of subject vehicles can result in a dimming of the tail lights or loss of tail lamp functions. The loss of a rear tail lamp reduces the rearward visibility of subject vehicles, especially with respect to turn signal illumination and may increase the likelihood of a rear end crash". I recently called a new certified Mercedes Benz dealership near me who states this recall has been closed, however, there is no specific indication on whether that was the right or left tail light. Regardless, a recall covers both whether it happens simultaneously or at different increments. My requested resolution: to simply acknowledge the recall to replace this time the right tail lamp. Especially since any wiring issues poses risk of shortage or fire.

The contact's son owns a 2009 Mercedes-Benz C300. The contact stated upon taking the vehicle to the dealer for servicing, he was informed that the subframe was severely rusted. The contact stated that his son then informed him that while he was driving approximately 50 MPH and depressing the brake pedal to come to a complete stop, the vehicle started wobbling significantly. The dealer replaced the subframe, the rear tires, and completed an alignment on the vehicle. The vehicle was repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA. The failure mileage was approximately 87,000. Vehicle has been repaired.

My 2009 Mercedes Benz C300 4 Matic sedan fishtails at the rear end when I apply the brakes. I’ve owned the car for 8 years. Prior to this happening, I took it to the Mercedes Benz Dealership Repair shop, it was fully inspected on a hoist and fully gone through from bumper to bumper. May 6, 2021, I have a report and a video of the inspection but nothing was revealed related to the undercarriage suspension subframe rusting. Just a few days ago, I had rear brake work done thinking this was the problem and would solve the fishtailing when brakes were applied, maybe one of the calipers was sticking. I also had a 4 wheel alignment, however to my surprise the problem worsened. I called a Local mechanic, who offered to look under my car. After inspection of my vehicle it revealed that the rear undercarriage subframe is completely rotted out. I was advised that it is completely unsafe to drive and to immediately get rid out it to a local salvage yard. My Dream Mercedes still looks new on the outside as I have taken miraculous care of it over the years. Be aware everything that looks good on the outside can be rotted out on the inside. I live in a city that requires highway driving at 70 mph plus, this problem could have ended in a disastrous deadly way. Thank goodness my guardian angel was looking out for me. I checked into repairing the vehicle, the rear subframe is available and with labor the total cost of repair is well over $5000.00 with labor costing $1632.00 before tax alone. Mercedes knows this is a common problem and should recall these issues before someone gets seriously injured or killed.

the rear subframe @lower control arms right side rust on bracket when put break on the car go to right and make noise!!! the car just have 83.000 miles!! this have re call or not?we d'ont know untill seaching on web side findown couple owner C300 have problem said some

I am 80 years old, and disabled. Gave this car to my son, (age 53). Within a month, he experienced a potential LIFE THREATENING incident with the car. While driving, the car became very unstable and steering was almost impossible. The car was towed to A-1 Auto Repair in Pitman, New Jersey for analysis. This establishment has an excellent reputation for Mercedes-Benz repairs. Upon extensive review the shop advised "customer vehicle is very unsafe to operate and should not be driven"The Invoice states " ...During road test vehicle is unstable and steering and braking are out of specification and feels very unstable to operate. Checked vehicle suspension and undercarriage to diagnose rear subframe rusted off body mounts. and is hanging off left rear of body and subframe. Needs extensive repairs to undercarriage and subframe needs replacing with new body mounts.Advised customer vehicle is very unsafe to operate and should not be driven! ... There was no warning of this problem. The car has been garaged since purchased. Car regularly maintained by dealership. No mention ever made of RUSTING ! Mercedes states not there problem since warranty has expired.

2009 C300 at 120k miles car won’t start. Dashboard indicates “remove key from ignition” key was not in ignition, had car towed to the dealership, they said car needs a new steering lock and ignition switch due to malfunction. Total cost $1923. Thankfully car was not in motion when this happened. Please do a recall on steering lock and ignition switch for the safety of everyone!!!!