Mercedes-Benz C-Class Complaints

3,817 consumer complaints on file.

#11500152January 4, 2023
SUSPENSION
During planned car service my mechanics discovered that rear subframe is broken and is not safe to drive anymore. After investigation I found that this is a major issue that Mercedes owners have with this particular model. In Europe for this issue has been issued Recall, however in US for some reason Mercedes don't take responsibility. This is a major Safety hazard with possible fatal consequences.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11500226January 4, 2023
ENGINE
CEL on, P052e code for crankcase ventilation/PCV failure. Vehicle has about 55k miles. Extremely common failure on these vehicles at this mileage and expensive/complicated to repair. Will not pass state emissions because of this. Given extensive anecdotal evidence of the pervasiveness of this problem, recall should be issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11499880January 3, 2023
ENGINE
Common problem mercedes hasn’t addressed from the factory crankcase breather element at less than 50,000 miles and the smell pf gas that comes in to the cabin is horrible
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11499904January 3, 2023
ENGINE
On December 14, 2022 at approximately 3:45 pm in rush hour traffic in the high speed lane on i-75 in Bradenton, Fl, the 2014 Mercedes C250 I was driving lost total engine power, traveling from 80mph to 0 in seconds. I had just enough time because of the momentum of the speed I was traveling at to maneuver the car into the breakdown lane adjacent to a median construction site. Had I been traveling in the middle lane there would have been insufficient time to change lanes in heavy, fast traveling traffic and get to a breakdown lane. In other words, we could have been killed. There was no check engine light nor warning lights of any kind. The engine was quiet and there was no engine rattling noise or shuddering prior to the incident during over 7 hours of travel from Marietta, Georgia into Florida. The car had been purchased from a used car dealer in Marietta two days before and had passed the Georgia emissions test on 11/18/22. We had the car towed to a Mercedes Benz dealership 20 miles away in Sarasota. On 12/16/22 Mercedes mechanics deemed the catastrophic engine failure to be due to a broken timing chain (this was confirmed in a conversation12/21 with Mercedes Sarasota Service Manager Jim Foulkrod) and that there was no compression in the engine. Among the codes which came up during Mercedes multi-point inspection was 036562, exhaust cam signal and 34164. Mercedes’ estimate to fix the car was $24,222.13. We declined to move forward with engine repairs. Mercedes was threatening to charge storage fees so the car was donated to the charity, Veteran Car Donations, Heroes on the Water which towed the car on 12/20/22. The car remains with the charity awaiting title transfer information.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11499922January 3, 2023
STRUCTURE:BODY
While driving down the highway at approximately 55mph, my car abruptly swerved left nearly causing an accident with the vehicle in the opposite line. My car was taken to my personal mechanic where he found the rear subframe to be completely broken on the left side due to severe rusting. Luckily the break lines were not damaged during the breakage. I investigated this issue online and it seems to be a very common issue in which no recall has been issued. This is a very serious safety issue that very easily could have resulted in a fatality on myself or other and future failures. It is my understanding that Mercedes Benz has a 30-year corrosion warranty but the subframe is not covered. How can this be?
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11499936January 3, 2023
UNKNOWN OR OTHER
The control arm is currently freely hanging. The reverse subframe rusted out where the control arm connects to it causing severe swaying when braking.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11499728January 2, 2023
UNKNOWN OR OTHER
PCV regulator valve
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11499694January 1, 2023
STEERING
I was driving on highway I95, all the sudden, the vehicle shows, Power Steering Malfunctioning See Owner's Manual. I've lost the power steering in the middle of the highway. The steering was so hard and not safe. The next day, I've started the car and the issue isn't there anymore! Now the car is driving fine!!! Please, this need to be fixed, cause it may happen again, and that happens on a sharp curve, it may lead to a crash!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11499607December 31, 2022
SUSPENSION
I was teaching my 16 year old son how to drive when he got his learners permit . When we got onto the highway a car cut him off and he had to apply a firm steady brake . When breaking the car swerved from the rear into the other lane , nearly striking another vehicle . This also resulted in a loss of control when applying heavy breaking after I had him pull over and I took control of the vehicle once I was able to get the car to the shop I pulled the rear wheel s off and inspected the brakes , which were found to be in good condition . I looked around the vehicle and noticed where the rear driver side subframe connected to the control arm broke off from a manufacturer defective weld or poor selection of materials . component. Upon inspection both sides are perforated and have lost structural integrity. Many other vehicles of the model type have reported similar issues online. This is a serious safety concern that will happen to 100% of these vehicles. A recall needs to be issued by Mercedes for this immediately. This vehicle has very little rust anywhere except at these connections .
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11499457December 29, 2022
ENGINE
My car suddenly turned off at a stop sign. After I restarted it, it turned back on and my engine light turned on. I called the dealership and after inspection I was told that the valve for my crankcase was malfunctioning. The total cost, including both parts and labor are $1775. I have seen many complaints regarding this issue with the same vehicle. It is apparent that a recall should’ve been issued for this months ago. It is truly a safety issue when the car turns off at a stop sign or a ramp. I could’ve been hit while my car was stalling on a ramp exiting major highway. I implore you to rectify this issue immediately before someone gets hurt.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11499161December 28, 2022
STRUCTURE:BODY
Glass panoramic sun roof lifted off the vehicle at highway speed, I had to grab the front edge of roof,pull off the expressway. Tried to re seat it in the channels but could not close the roof. Drove 120 miles with roof open holding the front edge down, which continued to try to lift off the vehicle. . My vehicle is Mercedes’ 2015 c300. These vehicles have a recall for this very reason but my vin number is not listed. Don’t know why? Need to get my vin listed for this recall. Please help!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11499171December 28, 2022
SUSPENSION, STRUCTURE:FRAME AND MEMBERS:UNDERBODY SHIELDS
The contact owns a 2011 Mercedes-Benz C300. The contact stated that while driving at an undisclosed speed, the rear driver’s and passenger’s side wheels swayed left to right, and the rear driver’s side wheel detached from the suspension. No warning light was illuminated. The vehicle was taken to a repair shop where it was diagnosed that the rear subframe was rusted and needed to be replaced. The dealer was notified of the failure and the contact was scheduled an appointment. The manufacturer was notified of the failure and the contact was awaiting an estimate. The contact was provided a case number. The failure mileage was 88,640.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11499179December 28, 2022
ENGINE
Crankcase ventilation valve failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11499206December 28, 2022
SUSPENSION, STRUCTURE:FRAME AND MEMBERS
Sub Frame broke from rust. Mercedes Benz has acknowledged the issue in Europe and repaired/replaced the part at no charge. Numerous problems and complaints can be found on line indicating that we, the car owner must and can complain to Mercedes for partial or complete support on the repair. But they do not acknowledge the problem in the US.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11498933December 27, 2022
FUEL/PROPULSION SYSTEM
2016 MERCEDES BENZ C300. When I start the car , you smell gas inside and outside of the car. Also the fumes come the vent when the heat is turned on. I have approximately 69,700 miles on my car
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11499064December 27, 2022
ENGINE
The dealership is staying I have an issue with the crankcase valve vent and this seems to be a known issue effecting years 2015-2018.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11498686December 23, 2022
UNKNOWN OR OTHER
Crank case ventilation valve causing check engine lamp. Car has 42k miles. Recommended repair cost $2000
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11498619December 23, 2022
ENGINE
initial observation started happening intermittently a week before the car become inoperable. When the vehicle came to a stop like at a light the engine would sound like it was going to almost turn off like a rattle noise and a popping sound or like I hit a plastic bag sound on acceleration. Then the day it broke down I was merging onto interstate 15 I heard the same popping sound, the engine light came on and my car broke down. My car was towed to Mercedes Benz of Ontario and inspected by technicians there and by the claims inspector for safe guard international (service protection plan i purchased with the vehicle)I was told it needed an entire new engine due to cracks in two pistons, etc. This was confirmed by the claims inspector with safe guard. This car was well maintained and only had 69,000 miles on it. I don’t think I need to explain the how my safety or the safety of others was at risk when my car breaks down in the middle lane on interstate 15 in California and I have to get over to the shoulder. This vehicle is available for inspection if needed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11498620December 23, 2022
FUEL/PROPULSION SYSTEM, ENGINE
2015 Mercedes C300 crankcase ventilation regularly valve is garbage, have to spend around $2K to get it replaced. Very common issue for this model.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11498631December 23, 2022
STRUCTURE:FRAME AND MEMBERS
The contact owns a 2012 Mercedes-Benz C300. The contact stated while driving 30 MPH, she started hearing an abnormal sound. The contact stated no warning light was illuminated. The contact took the vehicle to the local dealer, where it was diagnosed with needing the rear subframe to be replaced due to severe corrosion. The vehicle was not repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 120,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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