Mercedes-Benz C-Class Complaints (2017)

253 consumer complaints on file.

#11500998January 10, 2023
ENGINE, POWER TRAIN, FUEL/PROPULSION SYSTEM
I purchased my 2017 C300 class Mercedes-Benz ("MB") in May 2021 from a used car dealership in Mobile, AL. At that time it had 36,000 miles. Less than 2 years later, on or about 12/15/22, as I was driving, the MB suddenly and without warning began to vibrate violently and immediately lost power. The car had @54,000 miles on it. I routinely drive interstate to and from work and had just gotten off of the interstate. I was lucky that I was driving at a low speed when this happened; otherwise, a serious accident could have resulted. I took it to the local MB dealership which told me that the car failed a compression test in the #1 cylinder and that the engine would have to be replaced. Subsequent research on the cause of this total engine failure with low mileage revealed that this engine has a chronic piston defect that damages the #1 cylinder, causing it to lose compression, and that MB has known about the defect for many years, an issued an internal bulletin about it. MB has not alerted the public nor instigated a recall. I was not informed by MB at any time that the C300 class engine had a chronic piston defect that would damage the #1 cylinder which would, in turn, cause the engine to lose power and the vehicle to vibrate and shake, creating a dangerous diving condition under all circumstances, but especially if the car was being driven at speed on a federal interstate highway. Despite demands by me and others, MB refuses to responsibly address the issue. The driving public is, and remains, clearly, in great risk of harm due to this defective engine and associated power train issues. It is patently unreasonable for MB to produce and market such a unsafe, dangerous and defective product that poses an unreasonable risk of harm to its customers and others when being used as it was intended. I understand that the NHTSA has opened an investigation on this defect and wish for my voice to be heard on it. Please contact me [XXX] for further details. INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION A
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11500918January 9, 2023
UNKNOWN OR OTHER
Check engine light code " P052E71" Crankcase Ventilation Valve Replacement is needed. There is a defective part oil separator and the valve is stuck. Must replace the whole assembly with the hoses. (Part is available for inspection). The problem has been confirmed by the Mercedes dealership. When starting the car, gas fumes come out and is very distinct in the air which is VERY dangerous in confined spaces as well as around other people. . You will fail emissions testing due to this. The repair will cost between $1600 - $2000. This is a know defect in these cars and should be recalled. It also pollutes the air and put the safety of everyone around in danger.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11500059January 4, 2023
ENGINE, ELECTRICAL SYSTEM
Hey good morning. There’s been a been a system failure. P052E Positive Crankcase Ventilation Regulator Valve Performance. Warning message I got was the engine light showed
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
#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
#11499179December 28, 2022
ENGINE
Crankcase ventilation valve failure.
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
#11497145December 12, 2022
ENGINE
Most M274 engines have P06DA00 fault code internally. Harness for oil pressure regulating solenoid valve is short/open inside the engine oil pan. It can cause excessive oil pressure and premature oil pump failure. As the broken wire is sunken in the engine oil, I worry if it can cause fire. If the oil pump fair during driving prematurely, engine can be stalled. Mercedes-Benz knew the issue but they decided to ignore it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11492970November 9, 2022
ENGINE, UNKNOWN OR OTHER
Crankcase Breather System: Vent Valve Fault code stored for block crankcase breather valve. The fault code is 052E71. A lot of Mercedes cars are reporting it online and no recall has been made. The labor to change this takes around 8-9 hours and the part costs 300. Company is doing nothing about it as a lot of W205 engines are having this issue
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11492300November 4, 2022
AIR BAGS, ELECTRICAL SYSTEM, AIR BAGS:FRONTAL:DRIVER CLOCKSPRING/SPIRAL CASSETTE
I was reversing my vehicle when I heard a snap, and the inside dash panel warning sign came on…later I google it and found out it has happened to many other people. the clock spring behind the steering wheel snapped and airbags warning signs came on with possibility of deploying at any moment.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11491370October 28, 2022
STRUCTURE
The contact owns 2017 Mercedes-Benz C300. The contact stated while driving 45 MPH, he heard air coming in through the OSI cover. Once the contact arrived at his destination, he noticed that the front sunroof panel had detached from the vehicle. The dealer was contacted and stated that the vehicle was not under warranty and that the vehicle was already repaired under NHTSA Campaign Number: 21V197000 (Structure). The manufacturer was contacted and stated that the vehicle was not under warranty and that the dealer was not obligated to repair the vehicle free of changer. The failure mileage was 40,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11490718October 25, 2022
ENGINE
ode P052E : Positive Crankcase Ventilation Regulator Valve Performance. This seems to be a common problem with the C300.It's not an easy fix. MB hasn't addressed this common issue. Also strong smell of gas coming into the cabin during start up. Took car to Keys Van Nuys Mercedes in North Hollywood and was no recall. We are inhaling these fumes and they blamed it on a hose that expands and fumes escape into the cabin. Wanted to charge for the repair but I refused.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11490679October 24, 2022
STEERING, ELECTRICAL SYSTEM
When I started my car, the dash did not reveal park, drive, or reverse. It illuminated with a warning light indicating an Electronic Stability Problem (ESP). Research revealed this to be an important safety feature and that the Mercedes-warning-lights-electric-stability-control may have problems with traction control requiring attention. The ESP light was NOT flashing for the system to intervene – as the car was parked in my garage. It did not light up with the word ‘OFF’ to assess whether it may have been inadvertently deactivated. The light stayed on indicating a suddenly improperly working ESP system. The light remained on after stopping and restarting the engine several times as the dealer maintenance technician suggested concluding with my vehicle being towed to Mercedes Benz of Augusta for service. I am not sure if the MB mechanic reproduced the issue as they discussed several other potential failure points before resolving to replace an item in the steering control module. Experiencing this alert, I became more concerned that a safety inspection may not have been part of the last maintenance service. This is my third Mercedes and I make sure to keep up with all my maintenance. I had never seen this warning light before. Up until this time the only warning light I had seen in my car was for low air in my tires. My safety was not at immediate risk. I am glad my car was not able to be driven, as I would have hated for it to stop while I was out and about. I am a proud Mercedes Benz owner as they are world renown for the safest cars on the road. My car has just over 25,000 miles and it was unimaginable that it would have this kind of failure. I should not be held accountable to pay for a safety failure that I should be part of required maintenance checks. An additional periodic Mercedes required safety inspection could prevent this potential breakdown while providing another measure to protect the life of Mercedes Benz owners.
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
#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
#11484931September 17, 2022
FUEL/PROPULSION SYSTEM
Please see attached letter: [XXX] Mercedes Benz Crankcase Valve Claim.pdf, repair estimate and other correspondence from Mercedes-Benz. This is an well-known issue where there is a gas lead from the engine where Mercedes insists doesn't pose a safety issue. During cold starts there is a smell of gas in the cabin and this is prevalent in colder climates like New England. Mercedes should make cars for all markets that are safe. INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11482918September 5, 2022
POWER TRAIN, ENGINE
My car threw the check engine code P052E, the issue is the positive crankcase ventilation valve being faulty. Incredibly common on this model and now failed on my car too at 60K miles. All maintenance was done up to this point with the dealer and at or before recommended intervals.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11482136August 31, 2022
ENGINE, POWER TRAIN
My car leaked oil very fast while me & my wife were on a trip and it stopped on the highway and engine was stalling and misfiring due to a manufacture defect that is common with this model so it did put us in a very dangerous & risky situation. Now after i paid $1,740 the dealer is saying that my car needs a new engine due to cracked piston in cylinder 1 that damaged the engine which is a common problem with this model around the 50k miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11481155August 25, 2022
UNKNOWN OR OTHER
There is an existing recall (21V197000) from Mercedes regarding defective glue attaching the roof panel to the car. The roof panel can dislodge and fly off the car, creating a road hazard. I have the same issue on my 2017 C300 where the panel has moved, causing a whistling noise. The deal has diagnosed this issue. However, my VIN is not covered by the Mercedes recall. I have reached out to Mercedes, and they refuse to include my vehicle in the recall. Other 2017 C300 models are included. I believe their recall does not cover all affected vehicles. The recall number is 21V197000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

← Back to Mercedes-Benz C-Class