Mercedes-Benz GLC-Class Complaints

782 consumer complaints on file.

#11539296August 18, 2023
FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING, LANE DEPARTURE: BLIND SPOT DETECTION, VEHICLE SPEED CONTROL
Active Emergency Stop Assist Currently Unavailable and Active Blind Spot Assist Inoperative.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11539238August 17, 2023
FUEL/PROPULSION SYSTEM, ENGINE
The Positive Crankcase Ventillation harness fails and check engine light goes on. Through my research I found that many C class and GLC class with same engine have had similar issues and there was a recall and covered. My particular VIN was not included in the recall but had this check engine warning sign before 50K miles warranty expires. The light always went away but now it has come back on for the third time and not going away. The cost to replace this simple module is mostly labor at 8 hours is around $2,000. I believe this is an emission component and need to be covered under state and federal emission standards warranty. The initial recall with this issue should be involved with same engine and cover all cars and SUV's with same engine. I do believe this is an Emission control device that is regulated by state and federal standards and should be covered under warranty.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11538813August 16, 2023
EXTERIOR LIGHTING
The digital lights are defective for the US market. The low beam doesn’t provide any light for night driving farther than x feet. It also has jagged edges across the beam that greatly effect night visibility. The adaptive part of the system doesn’t provide adequate lighting in the dark around curves, the car states it has cornering lamps but it does not/ is not activated for us market. When it’s completely dark, I cannot see the front sides for turning, the lights are a serious safety hazard. The headlamps also get condensation when wet and fog up and effect visibility where you cannot drive at night. The leveling sensor failed and subsequently rendered the auto high beam and adaptive lighting system inoperative. The car doesn’t do any of the listed safety projections it’s supposed o do, such as spotlight. One time it worked but when tested it was never able to see it again after a software update. Serious safety concerns regarding the over the air updates and advertised functionality vs real life performance
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11538701August 15, 2023
STRUCTURE:BODY
In May 2023 a black plastic portion of the roof blew off the car. The plastic part that blew off was around the sunroof. There was no wind or blow to the car or anything like that; there was no prior warning or error message; there were no symptoms in advance. The part simply blew off the vehicle. The part is not available for inspection. Others were put at risk because the portion that blew off could have hit them or their vehicles. If the parts obstructed someone's view, there could have been an accident. The dealer has inspected and recently repaired the vehicle and can confirm the incident. No others such as the manufacturer, police, or insurance representatives have inspected the vehicle.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11538722August 15, 2023
ELECTRICAL SYSTEM, STEERING, LANE DEPARTURE: WARNING
This 2023 GLC, a newly redesigned model, has a number of issues. The two most severe are the adaptive speed limit and the lane keeping assist. I had to disable the traffic sign recognition feature because I was on I-95 in Maryland where the posted speed limit was 65. The car abruptly slowed me down to 35 because it saw an exit sign speed limit but I was not on the exit. I was lucky the car behind me didn't hit me. A warning would be good but to brake the vehicle for a speed limit sign seems problematic. The more serious issue is the lane keeping assist. The car is supposed to show green markers when I'm above 37MPH and on a marked road. Normally, one turns red and eases the car back into the lane if I drift. There are 3 settings and mine is set to provide the most warning. If the system works (it sometimes does) I am already on the line at the alert. Typically, it could care less where I am in relation to road markings and will let me drift across lanes with no warning whatsoever. I took the car in to the dealership several times for this. The first time, they said "it's designed so you can't trick it." I didn't buy that. I then took it our for a drive with the service manager. He said "it detected steering input". I then let it drift across the road marking while removing my hands from the wheel and it provided no warning whatsoever (no turn signal use to disable the function). I asked him if he saw steering input that time. He said "I need a video of this". This issue has supposedly been sent to the engineers in Germany but this problem existed when new and it's been weeks with no resolution. This is a backup system but it is something I certainly paid for and would like to know it works should I actually need it. All testing was done in a safe manner and not around traffic. I can only attach pictures but I have videos as well. The dash should not be showing green lane markings on both sides in any of these screenshots from videos.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11538778August 15, 2023
ELECTRICAL SYSTEM, UNKNOWN OR OTHER, LANE DEPARTURE: ASSIST
Brand new car that had less than 1500 miles on it, one day went to start it while 20 miles away from home and error messages in dash and beeping "48V battery error, do not change transmission position, reduced functionality of driver assistance features...etc." and car would not start, could not turn steering wheel.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11538784August 15, 2023
ELECTRICAL SYSTEM, ENGINE, FUEL/PROPULSION SYSTEM
While driving on highway at 75 mph, the car began slowing down and an alert on the screen said "Stop. Switch off vehicle". Then the alert on the screen showed that the 48 volt system needed to be recharged. The car would not start and had to be towed to the dealership. The dealership says the car was out of gas, but the gauges did not indicated that the fuel was empty, so they will reset all of the sensors, but they still do not know why the car turned off and could not be restarted. They are checking the software because they cannot find anything wrong.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11538409August 14, 2023
ENGINE, UNKNOWN OR OTHER
Premature failure of the PCV assembly at 70,000 miles. Caused vehicle to turn off and sometimes engine to shake.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11538266August 13, 2023
FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING, LANE DEPARTURE: ASSIST, FORWARD COLLISION AVOIDANCE: WARNINGS
I was driving on driver assistance mode. Instead of following the curve to my left-hand side, the car drove off the road and hit a power line pole on the passenger side. The car was totally destroyed. I reported to the company and asked for an investigation about the incident, but I was told that they couldn’t get the car and investigate it. I think for the driver assistance function, similar to autopilot function, the company should have remote monitoring and collect the data automatically in order to make sure and improve its safety and reliability.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11538269August 13, 2023
ENGINE
The Crankcase ventilation valve has a malfunction. The actuator is blocked. Code #052E71. The manufacturer has inspected the vehicle and confirmed the issue. The same issue has happened repeatedly to numerous Mercedes owners. The car is not safe to drive with this issue because it could cause engine problems.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11538057August 12, 2023
EXTERIOR LIGHTING
Check Right low beam error messsage. Beam decreased light output, lightbulb out. Adaptive high beam not working and neither is the intelligent light system/active lights.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11537123August 8, 2023
VISIBILITY:WINDSHIELD, SEATS
The contact owns a 2017 Mercedes-Benz GLC300. The contact stated while activating the front windshield wipers, the wiper blades started scratching the front windshield. The vehicle was taken to the dealer and the front windshield was replaced. The contact stated that the failure occurred several times before the failure was corrected. On another occasion while entering the front driver side door, the contact became aware that the extended bar in the seat had protruded through the seat cover. The vehicle was taken to the dealer and the contact was informed that the front driver’s side seat needed to be replaced. The vehicle was repaired but the contact stated that the failure had occurred several times before the failure was corrected. On another occasion, the contact became aware that there was fluid leaking from the vehicle. The contact examined the vehicle and notice that the windshield washer fluid was leaking from the washer fluid reservoir. The vehicle was taken to an independent mechanic and was informed that the windshield washer fluid reservoir needed to be replaced. The contact was advised to contact the local dealer. The vehicle was taken to the dealer who stated that the vehicle needed to be diagnosed. The vehicle was not repaired. The manufacturer was contacted and referred the contact to the dealer. The failure mileage was 32,831.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11537315August 8, 2023
ELECTRICAL SYSTEM, POWER TRAIN, UNKNOWN OR OTHER
VEHICLE SHUT DOWN WHILE DRIVING. WARNING LIGHTS ILLUMINATE, CHECK ENGINE LIGHT, DO NOT SHIFT INTO GEAR WARNING, 48V BATTERY WARNING, ETC. WOULD NOT STOP ALARMING. COULD NOT SHUT OFF CAR. COULD NOT PUT CAR INTO PARK. COULD NOT START CAR. WARNING BUZZER WOULD GO OFF ENTIRE TIME. CAR WAS ONLY ABLE TO BE STARTED WHEN REMOTE START REQUEST WAS INITIATED WHEN CAR WAS IN THIS MODE, CAR WAS STARTED BUT THEN SHUT OFF 10 SECONDS LATERS APP STATES, “CHECK ENGINE LIGHT ON” WIL SHUT OFF THE CAR. CAR BACK TO NORMAL AFTER EVENT APPROX 60 MIN BUT CHECK ENGINE LIGHT REMAINS ON.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11536621August 5, 2023
ELECTRICAL SYSTEM, ENGINE
1 ) the car would not start several times. every error message scanned across the screen and i had to leave the car and lock it and wait 10-15 minutes and then it would start. if i had any type of emergency and this happened, it would be detrimental. the first time this happened was the day i got the car with less than 10 miles on it. this issue was recreated by service and a software update was performed and it hasn’t happened since. 2 ) all computers / screens turned off while the car was in drive and in motion. horrifying and so dangerous. i had no safety features active , as they all display on the two screens. this happened with less than 500 miles on the car. this was not duplicated by service and it happened one time. 3 ) the sunroof malfunctioned and would not close after the software update was performed. i had to bring it back the very next day. this problem was duplicated by service and was repaired. 4 ) today the camera / visibility system malfunctioned giving an error message “ system inoperative “. i drove it to service an hour after it happened. it makes me completely distrust every electronic component of the vehicle which scares me so much to even drive it not knowing if and when safety features will fail. mileage est 1350. i’m not sure if they have duplicated it, as it’s still in the shop. i have videos of the other issues but the form won’t let me upload videos. i uploaded a picture of the 4th issue in my report.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11536672August 5, 2023
ENGINE, EXTERIOR LIGHTING, ELECTRICAL SYSTEM
Unexpectedly and without any indication or warning, at [XXX] on [XXX] I experienced multiple system failures/engine light/critical warning lights/. Transmission error message states do not shift into gear, take for service. Engine check light on. Car would not start, car was unable to be put into park. Door alarm for transmission not in park was alarming audible. After car shut off and attempt to put into park the car would not engage into park and the car electronics malfunctioned, would not stop alarming despite off, multiple error messages, including traction control inoperative, blind spot inoperative, digital light inoperative, check the 48V batter Error, and other messages toggling on. Dealership Bergeron Mercedes made aware of problem on 8/04 And was told no appointments or lands car available and to drop off Monday sans appt, name on wait list. VIN [XXX] . This is a common problem on all of the forums regarding this first what new models hear 23 releases. I was unable to put the car into park and the parking brake could not hold in place/trusted. Also, the digital light malfunctioned and high beam assist and digital light. Became inoperative due to failed wheel level sensor. Car has less than than 5K miles /less than 3 months old. 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
#11536674August 5, 2023
EXTERIOR LIGHTING, ELECTRICAL SYSTEM, VISIBILITY/WIPER
Digital Light Inactivean High Beam Assist messages Also, when you engage the inoperative warning the actuates blinker it off [brights/high blinds beams even when drivers. auto adaptive setting is day with lights off see the high beam blue light on with headlight malfunctions vehicle 248595-Connected LEst sensor FaultY batterse causing, adaptive found fault C151E29 currentiy present charger invalid performed SDS for • f 0.00. Performed guided test, found vaLue Rear level value of 8149 Unplugged sensor • спескеа Ins no corrosion or loose pins. With different fault for from front left unevagged, was stored "no signal" • sensor. Plugged sensor back in, and sensor started reading correctly. Available Ordered new sensor; Customer to return when part Service Digital Light Inactiveand High Beam Assist inop erative . At this time.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11536675August 5, 2023
LANE DEPARTURE: BLIND SPOT DETECTION, ELECTRICAL SYSTEM, EXTERIOR LIGHTING
The moon roof will not close. There is also a sloshing sound of water in an unidentified area, it has not rained. The blind spot monitor function of the digital light projection works intermittently and is barely visible marking on the roadway. The exit assist also does not activate the ambient lighting when opening door and car Is approaching in the travel Lane. Digital lights have jagged output light beam and they are the illuminating the roadway as advertised.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11535976August 2, 2023
POWER TRAIN, ELECTRICAL SYSTEM, ENGINE
The 2023 GLC300 would not start. The internal alarms kept going off, the push-start/stop would not respond. The vehicle was acting like it was being stolen, this lasted for 75 to 80 minutes. The display said 12V On-Board Electrical System Service Required and Blind Spot Assist Inoperative - over and over again. Couldn't get the key to make car lock or unlock. The car would not turn on, it would not turn off. The alarm message was persistent. Had to call a tow-truck to take it in for service. After 3+ hours the car restarted. Mercedes initiated "Campaign: Update Powertrain Control Unit Software #2023060007". They found multiple communication faults in various modules. I was left stranded. This happened 3 times. Twice in front of the house and the 3rd time (when it was towed) I was far from home. The mechanic explained that the car had sensors indicating the car was being stolen so that is why it didn't start. That make no sense! I had the key. I had been driving it that day. It was working fine. A brand new 2023 car should be reliable. It should start when the owner has the key fob in hand. Shutting the car down for hours is a system failure. Please investigate.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11535378July 30, 2023
AIR BAGS, ELECTRICAL SYSTEM
All of the buttons on my steering wheel including the horn stopped working. I hear a clicking noise when i turn the steering wheel and the passenger air bag light randomly goes on and off. This leads me to believe the clock spring is broken. If the clock spring is the problem, this could create an airbag malfunction causing it to not deploy when needed or randomly deploy while i’m driving.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11534401July 25, 2023
SERVICE BRAKES, SEATS, STEERING
The first day the car was picked up by us, we turned back and complained about the steering wheel and drivers' seat vibration. They checked it and we were told they cannot find anything. We were told to drive the car for awhile and return it if this complaint persists. We returned it to Okemos Mercedes with the same complaint. They said it is the tires and they replaced the right front tire. I told them I was driving since I was 17 and I know the difference between body and tire problems. We were told to try it again and come back and if it persists to return for diagnostics. Same response. I have complained to both dealership and and Mercedes main office and Mercedes does not agree it is a warranty issue. During the July 4th holidays, our son drove it and it was the first time I became a passenger. I cannot believe how scary the vibrations, noise and feeling unsafe in the back was. I made numerous calls to Mercedes and they keep pointing at the tires as the issue. The tires are supposed to have 2 more years tread left but Mercedes Okemos tried to sell us a tire. I was told by Mercedes main office to keep calling [XXX] at Okemos Mercedes service center but he had not returned calls. Mercedes main office said [XXX] had not returned calls, either. They were pointing fingers at each other while we were driving our grandchildren in an unsafe car. 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

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