2021 MERCEDES BENZ GLC 300 Problems & Recalls

Cylinder head valve seat leak ..vehicle Mia fires and check engine light on

Vehicle Information: Year: 2021 Make: Mercedes-Benz Model: GLC 300 Engine: M264 Mileage at time of failure: Approximately 65,000 miles Complaint Description: While driving, my 2021 Mercedes-Benz GLC 300 began experiencing repeated engine misfires and rough running, accompanied by a persistent chec...

Vehicle Information: Year: 2021 Make: Mercedes-Benz Model: GLC 300 Engine: M264 Mileage at time of failure: Approximately 65,000 miles Complaint Description: While driving, my 2021 Mercedes-Benz GLC 300 began experiencing repeated engine misfires and rough running, accompanied by a persistent chec...

While I was driving on the Garden State Parkway, my vehicle experienced a sudden loss of power and persistent misfires and my check engine light came on. I was put in a position of a significant crash risk due to the fact that the vehicle loss sudden acceleration power while entering the parkway. I ...

There is a hesitation in or "shuddering" that causes the car to go into limp mode while in operation. I was in traffic and the car just powered down and would not get up to and or maintain speed. I contacted the local dealership and was told that there are other models and or engines in this car tha...

The vehicle lost power and will not operate over 40 mph/2000 rpms

Twice my car slowed down tremendously in traffic because of a bad cylinder head. I drive a 2021 Mercedes GLC 300 4matic with 33,529 miles. In reviewing other complaints, this is a common and known complaint. My check engine light came on and I could not go over 40 mph. This is very dangerous.

Car has experienced rough idling, sluggish to no acceleration, check engine light illuminates and no shifting of gears regardless of speed. It appears to be going into limp mode. This has occurred monthly for the last four months. After pulling over, the car is turned off, wait five seconds and th...

Check engine light came on. Code was P219D mixture formation is irregular on cylinder 2. Informed today, the cylinder will need to be replaced entirely for about $10,000. Concerned that although this did not happen to me, others have stated the vehicle completely stalls while driving.

what happened? While driving, all of sudden, engine light was on and shaky with rough vibration consequently loss of power. I pulled over and turned off engine. Engine light disappeared after restarted. It happened again and had diagnostics at the dealership. Software update was given at first sol...

The headlights stopped working due to water entering the assembly unit. First one side went out and then eventually the other side went out. The car was brought in to the dealership to fix and they stated it wasn’t covered. I’m recently learning about a recall of this issue with my type of car a...

Have been getting condensate inside vehicle headlights inwhich have cause the headlight to completely not work anymore.. There is no damage to headlight which means to be cause due to a problem with the seal. Checked with local and also statewide Mercedes advisors which was told there isn’t a reca...

Have been getting condensate inside vehicle headlights inwhich have cause the headlight to completely not work anymore.. There is no damage to headlight which means to be cause due to a problem with the seal. Checked with local and also statewide Mercedes advisors which was told there isn’t a reca...

Have been getting condensate inside vehicle headlights inwhich have cause the headlight to completely not work anymore.. There is no damage to headlight which means to be cause due to a problem with the seal. Checked with local and also statewide Mercedes advisors which was told there isn’t a reca...

Head problems

In September 2024 my vehicle's engine light came off and the car was struggling to accelerate, especially in highway. I took it to Mercedes Benz of Cincinnati and they acknowledged the fault, made some repairs (under warranty) but the mechanic told us he had already seen quite a few of these cars n...

Our 2021 Mercedes is 4 years old and had the engine light come on. The vehicle has always been maintenance by Mercedes and well taken care of. The engine had a Cylinder Head Failure which resulted in a $7600 repair for a 4 year old vehicle. Mercedes refused to offer a good will repair. This is A ma...

I seen a recall for certain 2021 GLC 300 vehicles for moisture in right side headlamp, causing headlamp to blow (go out). This happened on my 2021 GLC 300. Same moisture issue, same year, same model, however, my vin number does not show that it has a recall. I believe this safety issue needs to b...

I seen a recall for certain 2021 GLC 300 vehicles for moisture in right side headlamp, causing headlamp to blow (go out). This happened on my 2021 GLC 300. Same moisture issue, same year, same model, however, my vin number does not show that it has a recall. I believe this safety issue needs to b...

The contact owns a 2021 Mercedes-Benz GLC300. The contact stated that there was condensation inside the front passenger’s side headlight housing after it had rained. The contact then stated that while driving at night, the passenger’s side headlight failed to operate as needed. There was no warn...

Mileage: 92,700

On [XXX] my GLC 300 AWD while driving back from work started shaking, went into limp mode, engine started misfiring and check engine light came on. Pulled over into a parking and called Mercedes-Benz road side assistance, they sent a tow truck and the car was towed to the Mercedes-Benz of Oklahoma C...

While driving my vehicle on March 3, 2025 the check engine light came on. Additionally my vehicle began to shake. I was scheduled for a service appointment on March 5, 2025 and told the service department the check engine light need to be addressed. Upon inspection, it was determine the cylinder hea...

High beam can't auto dim Fuel pump fail to operate, misfires, and shut down while driving

High beam can't auto dim Fuel pump fail to operate, misfires, and shut down while driving

High beam can't auto dim Fuel pump fail to operate, misfires, and shut down while driving

While slowly backing out of the driveway and without contacting anything at all, the rear window completely shattered. The window has never been hit by anything and had no defects yet it completely shattered so clearly reflects a manufacturing defect of some sort that is incredibly dangerous to pass...

While slowly backing out of the driveway and without contacting anything at all, the rear window completely shattered. The window has never been hit by anything and had no defects yet it completely shattered so clearly reflects a manufacturing defect of some sort that is incredibly dangerous to pass...

Mercedes App displays low battery alert. Brought to dealer who stated Mercedes told them (dealer) to inform anyone coming in with this issue to just disregard the alert in the app. Had the battery checked anyway. At the conclusion was told I had to “drive the car longer so the battery would rechar...

Driving short distance home when the bottom of Mercedes GLC 300 caught fire without warning or notification. I was unaware when a good Samaritan screamed out your car is on fire. Pulled over and she helped me out. Seconds later the car exploded into flames and the car was demolished.

The contact owns a 2021 Mercedes-Benz GLC300. The contact stated that while driving at low speeds, the vehicle lost motive power struggling to produce enough power to propel itself on a slight incline. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic, ...

My vehicle suddenly starting getting moisture in the passenger side head light.Many people brought this my attention.After some time of moisture the head light begin to flicker on and off while I was driving.Then it just went out and stopped working.Eventually I took it to the dealer and they inform...

My vehicle suddenly starting getting moisture in the passenger side head light.Many people brought this my attention.After some time of moisture the head light begin to flicker on and off while I was driving.Then it just went out and stopped working.Eventually I took it to the dealer and they inform...

My headlight is absorbing moisture & causing my light to have a shortage.

While drive check engine light came on and car would go past 20 miles per hour. This is the second occurrence. First time this occurred October 2023 and covered under warranty. Head Gasket blew.

The contact owns a 2021 Mercedes Benz GLC300. The contact stated that while driving at a low speed, the vehicle began to shake as the check engine light appeared on the instrument. In addition, the contact stated that the vehicle began to hesitate upon the depression of the accelerator pedal. Due to...

Mileage: 56,000

Vehicle has a known engine failure. Leaking valve in Cylinder head. Cylinder 3 injector is faulty

Vehicle has a known engine failure. Leaking valve in Cylinder head. Cylinder 3 injector is faulty

The contact owns a 2021 Mercedes Benz GLC 300. The contact stated that while driving at various speeds, the vehicle would lose power and fail to accelerate upon the depression of the accelerator pedal. The check engine light would appear on the instrument panel. Despite the failure, the vehicle woul...

Mileage: 35,000

The contact owns a 2021 Mercedes-Benz GLC300. The contact stated that while his spouse was driving approximately 35 MPH, the passenger’s side side-view mirror fractured without impact. The dealer was contacted to schedule an appointment; however, the vehicle had not been taken to the dealer to be ...

Mileage: 25,000

Vehicle left/front headlight has water condensation and entire headlight doesn't work. Its pretty much not drivable. I brought the vehicle to a manufacturer dealership and they claim that the failure of the headlight is due to physical impact to the exterior of head light. There is a minor scratch b...

The contact owns a 2021 Mercedes-Benz GLC300. The contact stated that while his wife was driving in the rain approximately 35 MPH, the vehicle lost motive power and stalled. The vehicle was able to be restarted. The vehicle was taken to a dealer to be diagnosed. The contact was informed that the cyl...

Mileage: 19,369

On 12/17/2023 at approximately 6:00 am while traveling to a friends house, my car stalled out on me. The engine light came on and the car started hesitating ( sputtering) and then shut off. I tried to start the car and it did with the engine light still on. I called a tow truck and had it towe...

This is the 3rd incidence of this issue (July, Oct, Dec), but we have been advised that a software update is not yet available from the manufacturer. In all instances, we were travelling at a normal rate of in-city traffic (30-45 mph) and all of sudden the vehicle will not accelerate above 25 mph r...

This is the 3rd incidence of this issue (July, Oct, Dec), but we have been advised that a software update is not yet available from the manufacturer. In all instances, we were travelling at a normal rate of in-city traffic (30-45 mph) and all of sudden the vehicle will not accelerate above 25 mph r...

This is the 3rd incidence of this issue (July, Oct, Dec), but we have been advised that a software update is not yet available from the manufacturer. In all instances, we were travelling at a normal rate of in-city traffic (30-45 mph) and all of sudden the vehicle will not accelerate above 25 mph r...

The contact owns a 2021 Mercedes-Benz GLC300. The contact received notification of NHTSA Campaign Number: 23V445000 (Fuel System, Gasoline) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repa...

The contact owns a 2021 Mercedes Benz GLC300. The contact stated while driving approximately 65 MPH, the vehicle lost motive power and failed to accelerate properly while depressing the accelerator pedal. The contact pulled over to the side of the road and turned off the vehicle. After restarting th...

Mileage: 28,000

My sunroof exploded while I was driving on the highway. There were no other cars around me and no overpasses. There is no explanation for the sunroof breaking. I thought someone shot out my window. It was the scariest experience I have ever had driving. If there were cars around, it might have cause...

Vehicle will flash warnings on dash the the blind spot assist in inoperative and the front passenger air bag malfunction. The active brake assist is also malfunctioning as the two white cars colliding is on. The dealership as tried to fix this issue 5 times and has tried argue the the active brake ...

Vehicle will flash warnings on dash the the blind spot assist in inoperative and the front passenger air bag malfunction. The active brake assist is also malfunctioning as the two white cars colliding is on. The dealership as tried to fix this issue 5 times and has tried argue the the active brake ...

Vehicle will flash warnings on dash the the blind spot assist in inoperative and the front passenger air bag malfunction. The active brake assist is also malfunctioning as the two white cars colliding is on. The dealership as tried to fix this issue 5 times and has tried argue the the active brake ...

My car was bought new in October 2021 & I began having problems after having it for 6 months & the mileage at that time was about 4000 miles - it was in April 2022 & the check engine light came on & I had a loss of power to where it slowed down & would not go any faster than about 30/35 miles an hou...

My car was bought new in October 2021 & I began having problems after having it for 6 months & the mileage at that time was about 4000 miles - it was in April 2022 & the check engine light came on & I had a loss of power to where it slowed down & would not go any faster than about 30/35 miles an hou...

The HVAC system has a very had odor that could impact our respiratory health, and giving us headaches when we drive. I wanted to share with you my current situation that I believe relates to the Mercedes HVAC Class Action Settlement (https://www.mercedeshvacsettlement.com/). My 2021 GLC300 Mercede...

Driving on I75 in Georgia using Distronic speed control. This system scans highway speed control signage and automatically adjusts the vehicle speed based on speed limit signs. Unfortunately the state of Georgia has deployed MINIMUM SPEED 40 signs alongside the highway that are identical in size a...

Driving on I75 in Georgia using Distronic speed control. This system scans highway speed control signage and automatically adjusts the vehicle speed based on speed limit signs. Unfortunately the state of Georgia has deployed MINIMUM SPEED 40 signs alongside the highway that are identical in size a...

Sunroof glass panel exploded outward. Fabric retractable interior sunroof liner did contain all of the fragmented safety glass. No prior impact on or to the sunroof. If the interior fabric sunroof liner had been retracted, the interior of the vehicle would have been showered with the glass shards im...

Sunroof glass panel exploded outward. Fabric retractable interior sunroof liner did contain all of the fragmented safety glass. No prior impact on or to the sunroof. If the interior fabric sunroof liner had been retracted, the interior of the vehicle would have been showered with the glass shards im...

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.

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.

The contact owns a 2021 Mercedes-Benz GLC300. The contact received a recall notification for NHTSA Campaign number: 21V354000 (Back Over Prevention, Electrical System). The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was notif...

The contact owns a 2021 Mercedes-Benz GLC300. The contact received a recall notification for NHTSA Campaign number: 21V354000 (Back Over Prevention, Electrical System). The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was notif...

The contact owns a 2021 Mercedes-Benz GLC300. The contact stated that while his wife was driving at an undisclosed speed, the "Add 1 quart of oil" message was illuminated. The contact's wife did not pull over and continued driving while the "Stop driving" warning message was illuminated. The contact...

The contact owns a 2021 Mercedes-Benz GLC300. The contact stated while driving at various speeds, the vehicle hesitated to accelerate while the accelerator pedal was depressed. The contact stated there was no warning light illuminated. The vehicle was taken to a local dealer but was not diagnosed or...

Mileage: 7,000

The contact owns a 2021 Mercedes-Benz GLC300. The contact stated while driving at various speeds, the vehicle hesitated to accelerate while the accelerator pedal was depressed. The contact stated there was no warning light illuminated. The vehicle was taken to a local dealer but was not diagnosed or...

Mileage: 7,000

Excessive frame rust, the pictures I included are all the patches that have been done to the frame so far.

Excessive frame rust, the pictures I included are all the patches that have been done to the frame so far.

On day zero when I bought the car, it was raining. The new car wiper was shattering or making bumpy movements. It was not cleaning the heavy rain water or it was spotty. The Mercedes mechanic told it is a known issue and there is no permanent fix. They just changed the wiper blade and put solvent on...

Entered parked vehicle and noticed very strong gas fumes. Vehicle would not start. Looked under the vehicle and noticed very large quantity of gasoline on the ground. Vehicle was towed to Mercedes dealership in Rochester, Michigan. Diagnosis was an incorrectly installed fuel line bracket. New b...

Fuel line malfunctioned, car stopped , gasoline was pouring out from under the hood. I was "lucky" that it did not catch fire, fire department showed up, closed the street, car was towed, dealership " replaced high-pressure line of fuel system high pressure pump". It all started without a warning, s...

ON APRIL 21, 2021 AT ABOUT 1800 (TIME), LESS THAN 45-HOURS AFTER PURCHASE OF THE NEW 2021 GLC 300 VEHICLE, THE INTERNAL COMBUSTION (ENGINE) MISFIRED AND ABRUPTLY MALFUNCTIONED WHILE IN STEADY ACCELERATION AT 65-MPH. MY FAMILY AND I WERE HEADED EASTBOUND ON THE CA-60 FREEWAY IN LANE THREE (LEFTMOST, ...

Mileage: 90

ON APRIL 21, 2021 AT ABOUT 1800 (TIME), LESS THAN 45-HOURS AFTER PURCHASE OF THE NEW 2021 GLC 300 VEHICLE, THE INTERNAL COMBUSTION (ENGINE) MISFIRED AND ABRUPTLY MALFUNCTIONED WHILE IN STEADY ACCELERATION AT 65-MPH. MY FAMILY AND I WERE HEADED EASTBOUND ON THE CA-60 FREEWAY IN LANE THREE (LEFTMOST, ...

Mileage: 90

2021 MERCEDES GLC. CONSUMER WRITES IN REGARDS TO VALVE SPRING FAILURE AND STALLED ENGINE. *LD THE CONSUMER STATED SHORTLY AFTER PURCHASING THE VEHICLE, THE VALVE SPRING BROKE CAUSING THE ENGINE TO FAIL WHILE DRIVING. THE FAILURE MILEAGE WAS 199. THE CONSUMER STATED THE ROADSIDE ASSISTANCE GROSSLY...

Mileage: 199

I HAVE PURCHASED THE 2021 MERCEDES-BENZ GLC 300 4MATIC COUPE AND NOTICED A DESIGN FLAW ON THE CAR. AS YOU CAN SEE IN THE ATTACHED PICTURE, THE FRONT BUMPER PROVIDES NO PROTECTION TO THE RADIATOR. IT HAS ALREADY STARTED CHIPPING DUE TO THE ROCK DAMAGE. THIS CAN LEAVE THE CAR IMPAIRED ON THE FREEWAY W...

Mileage: 10

I HAVE PURCHASED THE 2021 MERCEDES-BENZ GLC 300 4MATIC COUPE AND NOTICED A DESIGN FLAW ON THE CAR. AS YOU CAN SEE IN THE ATTACHED PICTURE, THE FRONT BUMPER PROVIDES NO PROTECTION TO THE RADIATOR. IT HAS ALREADY STARTED CHIPPING DUE TO THE ROCK DAMAGE. THIS CAN LEAVE THE CAR IMPAIRED ON THE FREEWAY W...

Mileage: 10

THERE IS AN EXISTING ISSUE FOR MERCEDES-BENZ VEHICLES. SERVICE CAMPAIGN #2019040010. HOWEVER, IT ONLY INCLUDES 2019 MODELS. I PURCHASED A 2021 GLC MODEL AND IT HAS THE SAME ISSUE OF NOT HAVING THE PROTECTION ON FRONT RADIATOR. LOOKS LIKE MERCEDES-BENZ DIDNT DO ANYTHING ABOUT THIS ISSUE AND KEPT MAKI...