Mercedes-Benz GLC-Class Complaints

782 consumer complaints on file.

#11463663May 6, 2022
UNKNOWN OR OTHER
Crank case vent valve went out. Then turbo went out after that. Car smells of gasoline inside cabin.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11463692May 6, 2022
STEERING
Driving on uneven surfaces the steering wheel start shaking and vibrating including the car body.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11461938April 24, 2022
POWER TRAIN
It took a few minutes to be able to completely turn left out of a shopping center while waiting in line. When finally able to turn left, the car stalled into what appeared to be neutral where I had no control to increase speed and was turning very slowly. Oncoming traffic from both ways were coming and luckily stopped on-time. I had to turn off the entire car and restart in the middle of the road in order to be able to drive again. There could've been a massive collision if cars were not paying attention on both sides. Note that the car was NOT in neutral at the time and was in drive the entire time. This same incident also happened over a year ago but thought it was something I could've done wrong or was a one-time thing. Now that it's happened twice confirms that there is something wrong with the car. The car did not indicate a power failure or warning lights during this incident. I have an appointment with Mercedes on 4/25 to get this looked at. This has been reported on other models from other car owners but we have never seen a recall. This is a serious malfunction and could've gotten myself or others killed. I do not feel safe driving this car unless it is fixed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11461583April 21, 2022
UNKNOWN OR OTHER
check engine light comes one and give code: P052E - Positive Crankcase Ventilation Regulator Valve This is a faulty part that commonly breaks down in all Mercedes GLC 300 and C class. It's part of the emissions system and should be covered under the federal warranty. However, Mercedes won't cover it and charges $3000 for the repair. This is unsafe and unfair practice as they're selling vehicles that they know will break down eventually and could cause harm to their "customers".
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11461437April 20, 2022
UNKNOWN OR OTHER
At ~40,000 miles my check engine light came on. I took it into the shop for a diagnostic and they informed me that I need to replace the Positive Crankcase ventilation valve/Air Intake Hose. They told me that this is a common issue with this make of Mercedes and that they have done about 4 in just the past few months. Furthermore, they told me that this issue has been fixed on newer models of the same vehicle. This seems like the responsibility of Mercedes to fix this known issue with their car via a recall.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11460844April 15, 2022
ENGINE
P052E postive crankcase ventilation regulator valve
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11460597April 12, 2022
ELECTRICAL SYSTEM, ENGINE, VEHICLE SPEED CONTROL
As I drove the car a warning message popped in the screen stating "Malfunction" without any further details. The car kept running, apparently we'll at first. Then after car was turned off and turned on again the car accelerated by itself proving very dangerous. The day after, le message popped up again, but the car began accelerating by it self in more than three occasions, at one point almost colliding with the car in front. Also a loss of control at certain times during driving was experienced causing impared drivability compromising occupants and driver's safety. In my car was my wife and my three kids.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11460165April 8, 2022
ENGINE
P052E issues
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11458836March 29, 2022
ENGINE
Got a Check Engine Light at 32,400 miles and the code said it was the Positive Crankcase Ventilation Regulatory Valve. It was under warranty, the job requires over 6 hours of labor, and it's due to a intake breather valve getting gummed up with oil/oil vapors/condensation. Well, the check engine light came on again at 58,000 miles and 3 years later. Now not under warranty, the dealer quoted 6 hours and $1435 to do the same repair that was done before. The part is EXTREMELY difficult to get to in order to change, and requires the removal of many engine components, including one of the engine mounts. It seems like this is one of the most common repairs for this series of car. It's been so troublesome, that Mercedes has redesigned the part.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11458518March 27, 2022
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
Unexpected Severe braking when changing into turn lane. Unexpected severe braking when approaching intersection with no cars in intersection or on either side of car.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11458288March 25, 2022
ENGINE, SEAT BELTS
The vehicle engine amber light on, everything else looks like normally. Bring the vehicle to Mercedes dealership to diagnose and fix. After dealership fix, we find out this vehicle maximum speed is 61 during driving on the freeway and it cannot speed over 61. Also, the engine amber light is on again and seatbelt is not working well. We have safety concerns when driving this vehicle on the freeway. Thanks.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11455489March 7, 2022
ENGINE
Sometimes after I hit the brake (hard or soft) but need to step on the gas again, the car pauses and does nothing for over a second, making it dangerous if you need to make a turn. Sometimes the car is confused whether to go fast or slow down so it does nothing and does not re-act to the driver pushing the pedal down. This situation can leave the driver in dangerous situations regarding on coming traffic
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11455565March 7, 2022
SERVICE BRAKES
Continuous problem with brakes squealing very loud. Have had brake pads replaced and taken to dealership multiple times to no resolution. It is a huge problem with how loud it is not to mention unsafe and making me feel uneasy about them giving out at any time. This is ongoing from several years ago
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11455199March 4, 2022
ENGINE, ELECTRICAL SYSTEM:IGNITION
The contact's wife owns a 2020 Mercedes-Benz GLC300. The contact stated that while his wife was driving at an undisclosed speed, the vehicle stalled. The vehicle was towed to the dealer and diagnosed with ignition failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired and remained at the dealer. The manufacturer was made aware of the failure but declined to buy back the vehicle and offered a two-year service plan for a free oil change per year. The failure mileage was approximately 30,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11454089February 25, 2022
BACK OVER PREVENTION, ELECTRICAL SYSTEM
The contact owns a 2020 Mercedes-Benz GLC300. The contact received notification of NHTSA Campaign Number: 21V354000 (Back Over Prevention, Electrical System). The dealer was notified of the recall and informed the contact that the recall repair would be performed over-the-air (OTA). The contact then called the manufacturer and was informed that the update was not available; he was informed that there was a waiting list and that he would receive a notification when the update for the vehicle was available. The contact had not experienced a failure. Parts distribution disconnect.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11454122February 25, 2022
FUEL/PROPULSION SYSTEM
The fuel line leaks directly under the driver seat. Filling the cabin with fuel vapors. Mercedes has an extended warranty for this problem but only on vehicles from 2004 to 2009.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11453712February 23, 2022
VEHICLE SPEED CONTROL:ACCELERATOR PEDAL
The contact owns a 2016 Mercedes-Benz GLC300W. The contact stated while driving at 65 mph the vehicle went through a sudden acceleration and then slowed down to about 65 mph. The contact stated no warning lights were illuminated. The contact got off the highway and proceeded to her destination. The contact said she smelled the odor of gasoline while the vehicle was parked. The contact was driving in a parking lot at approximately 5 mph when she lost power to her brakes and the vehicle had another occurrence of sudden acceleration. The vehicle jumped the curb and began to climb up an incline while the contact was attempting to brake. The contact hit a hedge with the vehicle sustaining some front-end scratches. The contact said she suffered some neck pain from the accident but did not seek medical attention. The police were contacted and a report was filed. The vehicle was towed back to the contact's home. The contact called the local dealer where it was towed, the dealer did not diagnose the vehicle. The contact said she also was smelling gasoline from her vehicle at the dealer. The vehicle was not repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 45,000.
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11453501February 22, 2022
SERVICE BRAKES, ENGINE, UNKNOWN OR OTHER
On 2/4/2022 this vehicle was picked up from Rockville Mercedes Dealership Mercedes-Benz of Rockville Centre (Service Center) (516) 766-6900. The vehicle was brought in for service regarding error lights and service lights. I was driving the vehicle from dealership back to my home and was unable to stop my vehicle and ran a traffic light and crashed into a Northwell Hospital building. The vehicle errored out on the road stating "Vehicle Malfunction" and i was unable to STOP my vehicle. I've contacted Mercedes and the local shop regarding this and no follow-up contact was made.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11453287February 21, 2022
FUEL/PROPULSION SYSTEM
P052E code, Positive Crankcase Ventilation Regulator Valve failed. It is a known issue by Mercedes Benz on its 2016 and newer C-Class and GLC class vehicles. The valve is clearly a manufacturer defect that is burdensome to the consumer as the part is located near the engine mount and prohibitively expensive to fix due to per hour labor rates. Hundreds if not thousands of consumers have been affected through no fault of their own.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11448875January 25, 2022
ENGINE
driving car and engine failed, #1 piston crack, turbo metal filings ruined it also, very expensive repair. both engine and turbo had to be replaced by mercedes benz service. many others are reporting this also, catastrophic failure at speed possible - not known if any fatalities associates with these engines (on both c300 and glc300 circa 2015 to ~2018)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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