Every record we hold for this vehicle, as plain tables, with nothing added. The consumer page shows the same records with the maintenance schedule, price ranges and nearby shops around them.
vehicle
2021 / mercedes-benz / glc-class
known issues
7 clusters (reviewed 2026-08-21)
complaints
none on file
recalls
0
investigations
0
fars
5 occupant deaths, crash years 2010-2024 (legacy-code)
Cylinder head failure with power loss and misfiresENGINE22 complaints2021-03 → 2026-06glc-2021-cylinder-head-engine-failure
11707845 The dealer confirmed a catastrophic cylinder head engine failure. The vehicle had only 39,000 miles. After some investigating, there have been numerous complaints from vehicle owners with the same issue on the M264 engine (which is what my vehicle has)
11709709 While driving, my 2021 Mercedes-Benz GLC 300 began experiencing repeated engine misfires and rough running, accompanied by a persistent check engine light. These symptoms began shortly after I purchased the vehicle and progressively worsened over time. The vehicle exhibited…
11648292 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…
11607115 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 would resume normal operation…
11754832 Moisture began collecting inside the left headlight assembly, even though the housing should be sealed. Over time, the condensation increased and the front left turn signal failed. The vehicle displayed warning messages for the turn signal, low beams, Blind Spot Assist, Traffic…
11674539 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…
11567054 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
Sudden engine power loss and limp mode while drivingFUEL/PROPULSION SYSTEM, ENGINE, POWER TRAIN8 complaints2021-04 → 2025-11glc-2021-engine-limp-mode-power-loss
11559715 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 regardless of the position of the throttle. My dealer, Mercedes Benz of Tampa, advises that the problem can only be corrected…
11698959 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…
11486730 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 hour going on a straight road way & no faster than about 10 miles an hour going uphill. The engine sounded funny as well. It had to be towed to the…
11718651 Fault code P06DA00 Engine Oil Pressure Control Circuit/Open. The Yellow Check Engine Light came on and the engine does not run properly and causes engine damage. We had to drive it slowly, under 45 mph, to the nearest dealership. This is a safety issue. To replace the oil pump…
11735862 Getting P06DA trouble code meaning that there is something wrong with the oil pressure solenoid in the oil sump. this is a known issue where the wiring of the solenoid get frayed. cost of repair for the (cheap part) is $7,500 because of 18 hour labor involved
11466660 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…
11502302 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
Fuel system failure causing stall or loss of propulsionFUEL/PROPULSION SYSTEM4 complaints2021-06 → 2024-12glc-2021-fuel-system-stall-pump
11421117 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"
11628817 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, who diagnosed a failure…
Blind Spot Assist and Active Brake Assist inoperativeFORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING, LANE DEPARTURE: BLIND SPOT DETECTION, AIR BAGS2 complaints2022-12 → 2026-03glc-2021-adas-blind-spot-brake-assist
11499353 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
11725180 This 2021 Mercedes-Benz GLC 63 AMG has experienced repeated and escalating warranty defects involving engine performance, loss of acceleration, air suspension failure, and now inoperative advanced safety systems including blind spot and active brake assist
FARS counts every occupant death in a fatal crash, whatever the cause — it does not mean the vehicle was at fault or defective. Counts are not adjusted for how many of each vehicle are on the road.
Cite this
Derived data is CC BY 4.0. Link back to the page you used. Text and BibTeX below.
Wrench.Pro (2026). 2021 Mercedes-Benz GLC-Class vehicle data [dataset]. https://www.wrench.pro/data/vehicles/2021/mercedes-benz/glc-class
@misc{wrenchpro_2021_mercedes_benz_glc_class_2026,
author = {Wrench.Pro},
title = {Wrench.Pro vehicle data: 2021 Mercedes-Benz GLC-Class},
year = {2026},
howpublished = {\url{https://www.wrench.pro/data/vehicles/2021/mercedes-benz/glc-class}},
note = {Derived from NHTSA public records. CC BY 4.0.}
}
