Mercedes-Benz C-Class Complaints

3,817 consumer complaints on file.

#11517082April 14, 2023
FUEL/PROPULSION SYSTEM
The valve for crankcase ventilation code P052E71 is not under emission warranty WHY ? 45K car and is not working and it will not pass emission test
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11517129April 14, 2023
STRUCTURE:BODY, SUSPENSION
Like apparently the majority of this model year C300, the rear subframe is completely disintegrated. This is a known issue but Mercedes has not communicated it nor fixed it. I was told, and as the photos clearly indicate, this very likely could have resulted in a catastrophic or fatal accident as the entire rear is corroded. I have photo and video support as well as the inspection from a mechanic.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11516496April 11, 2023
BACK OVER PREVENTION
The contact owns a 2020 Mercedes-Benz AMG C43. The contact received notification of NHTSA Campaign Number: 22V232000 (Back Over Prevention) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11516408April 10, 2023
STRUCTURE
The contact owns a 2015 Mercedes-Benz C300. The contact stated while driving 45 MPH, the roof carriage started shuddering. The contact veered to the side of the road. Upon inspecting the vehicle, the contact noticed that the roof panel had loosened. The contact stated continued driving and the roof panel fractured and partially separated from the vehicle. The vehicle was taken to an auto glass repair shop, where the roof panel was replaced; however, the failure reoccurred. The vehicle was taken back to the same auto glass repair center. The contact then became aware of NHTSA Campaign Number: 21V197000 (Structure) that he related to the failure. The dealer and the manufacturer were notified of the failure and informed the contact that the VIN was not included in the recall. The vehicle was not repaired. The failure mileage was approximately 85,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11515931April 7, 2023
STRUCTURE, SEAT BELTS
The contact owns a 2017 Mercedes-Benz AMG C43. The contact stated that after the dealer performed an unknown recall repair and Honda of Newnan (391 Newnan Crossing Bypass, Newnan, GA 30265) replaced the ball joints and axles, the contact noticed that the roof panel had detached, causing the front panel to loosen, and the driver's side air bag was visible. Additionally, the front driver's side seat belt failed to retract. The dealer was made aware of the failure and referred the contact to the manufacturer. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and advised the contact to file a complaint with the NHTSA Hotline. The contact related the failure to NHTSA Campaign Numbers: 21V197000 (Structure) and 21V032000 (Seat Belts) however, the VIN was not included in the recalls. The failure mileage was approximately 58,237.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11515645April 5, 2023
ENGINE
P052E positive crankcase ventilation regulatory valve Part number 274-090-17-29-80
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11515333April 4, 2023
SUSPENSION
I was driving on the freeway and had to hard brake due to unexpected stopped traffic. When I braked the vehicle veered hard to the left and almost lost complete control of the car and nearly caused a serious accident. I drove immediately to a local MB dealer and they confirmed what I was afraid and suspected which was the right rear subframe needs replaced. This car was recently sold to me by a dealer less than a month ago and not a single warning light or indicator warning me of this issue. The repair is over 7500 and the shop highly recommended I no longer drive until it’s replaced. This problem is very common and MB actually covers the cost in Europe and Canada.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11515411April 4, 2023
ENGINE
I have a 2017 C350E with 69K miles. Dealer wants $2900 to fix the Crankcase Ventilation Valve. The part that needs to be replaced costs about $600 with lot of labor time involved (~$2500). The part number is 274090560084. The C350E has a 15 year emissions control warranty in California that is supposed to cover "all" emissions control related parts, but Mercedes Benz USA doesn't seem to think this is part of the emission control system. I have done some research and it appears that "crankcase ventilation" is a necessary function of the engine because "blow-by" fumes would build up in the crankcase if it were not ventilated. These "blow-by" fumes used to be vented straight to the exhaust in older cars, but in the 1960's they started to recirculate them with the PCV system back into the intake manifold to limit the emissions. The function of this part seems to do the same thing a PCV system.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11515018April 2, 2023
UNKNOWN OR OTHER
The fault code P052E71 is logged in the fault memory of the engine control unit. Cause: Possible cause: The component or the electrical actuation at the partial load crankcase ventilation valve (Y58/2) may be faulty or might not activate initially.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11514974April 1, 2023
ENGINE
PCV Valve causing contamination and shortening the life of the engine oil.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11514709March 31, 2023
ENGINE
Check engine light keeps coming on and off.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11514829March 31, 2023
SUSPENSION
the rear subframe is rusted out and this is a big saftey concern by mercedes benz for 2008-20014 and they know the problem as there are alot of complaints. there were recalls in europe for this and not in USA. This needs to be taken care of by Mercede-Benz.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11514880March 31, 2023
ENGINE
My vehicle is a 2015 C300 AWD. One day I was driving on the highway and noticed white smoke coming out of the exhaust. The check engine light came on shortly after as I pulled over. Being that I was less than a mile from my house, I decided to go park the vehicle. I noticed that it was losing power and had problems going above 45mph. Since my vehicle had 99k miles. I took it to my indy mechanic that has worked on the vehicle since it has been out of warranty. When he diagnosed the vehicle, 48 codes came up. He suggested we change the spark plugs and coils, which we did. Didn't fix the problem. Then he suggested we change fuel injector 1, which we did. That didn't solve the problem. I decided to take it to the local Mercedes dealership where they did another diagnostic test. And like many others here, cracked piston/cylinder 1 dead. I'm looking at $18,000 in repairs. I told them no thank you. The car is now sitting in my garage. I really hope Mercedes makes this right with its customers. There is no reason why this many people should be having this exact same problem. Vehicle Symptoms: White smoke out of exhaust Check engine light on Cylinder 1 Misfire Burning Oil Causing loss of power Radio randomly shuts off & went into Anti Theft Mode
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11514640March 30, 2023
ENGINE, FUEL/PROPULSION SYSTEM
2015 C300 Crankcase Ventilation Valve Replacement P052E71 NEED TO BE REPLACED, ENGINE LIGHT COMES ON. ONLY HAVE 37,000 MILES MANY REPORTS OF THIS ISSUE
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11514167March 28, 2023
STRUCTURE, VISIBILITY
The contact owned a 2011 Mercedes-Benz C300. The contact stated that upon entering the vehicle, he noticed that the inside of the vehicle was flooded with water. The contact then stated that he noticed that water had leaked from the sunroof and entered the cabin of the vehicle. The contact stated that several unknown warning lights were intermittently illuminated. The vehicle was taken to an independent mechanic where it was diagnosed that the wiring harness was severely damaged and could not be repaired. The dealer was not notified of the failure. The vehicle was not repaired. The vehicle was deemed a total loss by the insurance company. The manufacturer was notified of the failure and the contact was provided a case number. The failure mileage was 82,242.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11514309March 28, 2023
UNKNOWN OR OTHER
UNKNOWN: Transmission malfunction on the computer for the car. Seems like a sensor problem
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11514093March 27, 2023
ELECTRICAL SYSTEM, STEERING, SUSPENSION
Car slow down and stop and cannot start in traffic….
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11514007March 27, 2023
POWER TRAIN
PVC valve shouldn’t fail and each time it does it is around 2k dollars.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11514058March 27, 2023
SERVICE BRAKES
2014 Mercedes-Benz E-350 4matic. Brake fluid and Brake warning lights illuminated. The vehicle was taken to the local dealer where the service technician advised the brake lines to the rear tries were rusted and had to be replaced . The vehicle was repaired at a estimated cost of $2,900. The approximate failure mileage was 100,000. we were advised that the car is a hazard to drive until repaired. We have requested the dealer to turnover the failed parts for our inspection and use
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11514065March 27, 2023
ENGINE
my car is a 2015 C300 class Mercedes-Benz, as I was driving, the car suddenly and without warning began to vibrate and shake violently and immediately lost power. Fortunately I was off the freeway, a serious accident could have resulted. I took it to the the local MB dealership and they told me that the car failed a compression test in the #1 cylinder and that the engine would have to be replaced at almost $17000. Of course, this was beyond warranty, Mercedes know it’s a defective product, they refused to act responsibly. This cracked piston which is a design flaw by Mercedes needs to be recalled, a lot of people are reporting the same issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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