Mercedes-Benz C-Class Complaints

3,817 consumer complaints on file.

#11489131October 13, 2022
ENGINE
Faulty camshaft adjusters creating timing chain to stretch and tensioners to fail , causing excessive wear to the crankshaft and wear of the teeth resulting in catastrophic damage and complete engine failure ( I have not replaced this timing chain or camshaft adjuster yet but i can hear the timing chain rattling from the defective parts from manufacturer. )
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488998October 12, 2022
STRUCTURE:BODY, SUSPENSION
Rear Subframe Cracking in Mercedes Benz 2012, C- Class, Sports. It can be life threatening for driver and passengers. Cost is $5700 for repairs. This replacement is free in Europe and Canada.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11489056October 12, 2022
ENGINE
Check engine light code P052E
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488777October 11, 2022
SUSPENSION:SUBFRAME/MOUNTING BRACKET
The contact owns a 2010 Mercedes-Benz C300. The contact stated that their wife was driving approximately 60 mph when there was a strange noise coming from the vehicle as well as a shaking sensation. The driver pulled over to the side of the road where the vehicle was towed to their place of work. The vehicle was inspected by the tow truck mechanic who stated that the rear-sub frame had severe rust and was the cause of the failure. The contact had not been taken to the dealer. The vehicle had not been diagnosed or repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 90,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488861October 11, 2022
ELECTRICAL SYSTEM, SEATS
Power Seat Button Failed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488867October 11, 2022
FUEL/PROPULSION SYSTEM
My Mercedes 2012 C 300 is leaking gas which may lead to fire ( the fuel filter flange when operated in high temperatures
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488879October 11, 2022
AIR BAGS, EXTERIOR LIGHTING
I purchased the vehicle in 2010 & immediately had to have the electrical system for all lights replaced. The lights on the vehicle goes out every 2 mos as if theres an electrical issue. Air bags had a recall & have been replaced now the system states there is a malfunction. This started 09/08/22.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488628October 10, 2022
ENGINE
Check engine light. Code: P052E, positive crankcase ventilation regulation performance.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488651October 10, 2022
UNKNOWN OR OTHER
Engine bay gets too much water whenever car wash has been done due to space between windshield and plastic engine bay shield (right hand side from vehicle driver seat) has slight gap.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488700October 10, 2022
STRUCTURE:BODY, SUSPENSION, UNKNOWN OR OTHER
Rare Subframe breaking off parts are not available for at least 6 months. I have kids and mechanics advise me to keep it off the road. My only means of transportation
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488550October 9, 2022
ENGINE, POWER TRAIN
my engine failed at 82k odometer miles . replaced it with a new engine for $10065 . and they said it was fixed and working normal , 2nd engine failed at 111000 miles . and has warranty. they refuse to fix it for a 3rd time ...... this is a common problem with m274 engines. please help us m274 engine owners.... its a very widespread known problem...
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488476October 8, 2022
UNKNOWN OR OTHER
I took my 2016 Benz through a car wash and realized the glass in front of my sunroof that is part of windshield is loose . I can hear wind coming through when I drive . This is driving hazard .
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488418October 7, 2022
ENGINE
Mercedes crankcase ventilation valve has failed, error P052E71. Found that this is happening to thousands of other Mercedes c300, and even after it is fixed it happens again. Reporting this so hopefully it can be resolved with a recall.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488123October 6, 2022
SUSPENSION
the back sub frame rotted away from rust
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488284October 6, 2022
EXTERIOR LIGHTING
Starting from the date I purchased the car, I realized dark shadows (always there) below the headlight line closer to the left and mid zone at the low beam. These shadows are actually formed within the illumination zone as if something is blocking them. I took it to the authorized Mercedes service (Hartford, New Country Mercedes-Benz, CT) and they confirmed the shadows. They told me that there are dust and scratches within the headlights, and they replaced the headlights (repair invoice is attached). However, the shadows are still present, and the service is now telling me that these shadows are normal and part of the light pattern and "vehicle is operating as designed and properly". To get a second opinion, I took it to another authorized Mercedes service at Springfield, MA (see attached service record), they also acknowledged the shadows, but they keep telling me that it is operating normally. These shadows are formed within the field of view and making blind spots on the road and every time I see them it feels like there is something on the road on that spot. Shadows very distracting and I am very concerned about my and others' safety while driving at night. I have driven several cars before and never experienced anything like this. My attempts to communicate with the manufacturer (Mercedes-Benz USA) also have been unsuccessful. No response to e-mails, and the person I have talked on the phone was disinterested in my concern. I have attached real-life images, a diagram showing the shadows’ locations along with repair invoices from both Hartford, CT and Springfield, MA Mercedes-Benz services. The car is available for inspection if requested.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488047October 5, 2022
FUEL/PROPULSION SYSTEM
When fuel tank is greater than approximately 3/4 full there is a strong fuel odor that seems to emanate from the rear passenger side of the vehicle; at lesser fuel quantities the odor is not noticeable. On one occasion I detected what appeared to be fuel dripping from underneath the vehicle. Took vehicle to dealership for troubleshooting and was informed "fuel leaks at the fuel pump" and it was recommended that the fuel pump and fuel sender be replaced. Additionally, the leak apparently damaged the electrical wiring harness to the fuel pump and that also needs to be repaired. There were no warning lamps or messages displayed that alerted me to this problem. Obviously, this is a hazard to safety.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488094October 5, 2022
ENGINE
The contact owns a 2017 Mercedes-Benz C300. The contact stated while driving 45-50 MPH, the vehicle stalled inadvertently and would not exceed 3 MPH. There was no warning light illuminated. The contact was unable to veer to the side of the roadway. The contact turned on the hazard lights. The contact turned off and restarted the vehicle however, the vehicle would not exceed 5 MPH and was making abnormal sounds. The contact veered to the side of the road for approximately 4 hours until there was no longer traffic on the roadway. The contact proceeded to drive at 5 MPH to her residence less than two miles away. The manufacturer was notified of the failure and assisted with towing the vehicle to the dealer to be diagnosed. The contact was informed that the piston rings had blown out and the engine needed to be replaced. The manufacturer informed the contact that the failure was a known failure; however, she would be responsible of the cost of the repair. The vehicle was not repaired. The failure mileage was approximately 29,650.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488114October 5, 2022
UNKNOWN OR OTHER, SUSPENSION:SUBFRAME/MOUNTING BRACKET
The rear subframe rusted and broke
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488116October 5, 2022
UNKNOWN OR OTHER
rear subframe rotted and broke
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11488118October 5, 2022
SUSPENSION:SUBFRAME/MOUNTING BRACKET
the rear subframe rotted away
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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