CarRecallWatchThe 2020 Mercedes-Benz GLC 300 has 16 safety recalls on file with NHTSA.
Owners have filed 70 complaints with NHTSA, including 3 crashes, 4 injuries.
The most-reported problem area is Engine (22 reports).
2020 Mercedes-Benz GLC 300 recalls
Headlights May Be Aimed Too High, Glaring Oncoming Drivers
Certain Mercedes-Benz GLC and AMG GLC 43 vehicles from model years 2019 to 2022 may have headlights that are aimed too high.
Front Roof Panel May Detach, Creating Crash Risk
The front roof panel, located between the windshield and the panoramic sunroof, may not have been bonded correctly to the vehicle during a prior repair.
Emergency call system may fail to connect in a crash
A software error in the communication module's SIM card can cause a mobile network connection failure.
Rearview camera may show no image, raising crash risk
The rearview camera may fail to display the rear view because of a software error.
Fuel leak could cause engine fire
Particles may have been trapped between the fuel rail and the fuel injectors during manufacturing, which can cause fuel to leak from the fuel system.
Loose Side Sensor Connectors Can Delay Airbags in a Crash
Side crash sensor connectors in certain vehicles may come loose.
Rearview camera may show a blank screen, raising crash risk
The multimedia system software in these vehicles can cause the infotainment display to stay black or reboot after startup.
Front roof panel may detach while driving, creating a crash hazard
The front roof panel, located between the windshield and the panoramic sunroof, may not have been bonded correctly to the vehicle during a previous repair.
Emergency call system may be disabled, delaying crash help
Some 2017 to 2021 Mercedes-Benz vehicles may have had their communication module inadvertently deactivated during a service visit.
Crash Alert May Send Responders to Wrong Location
Certain 2016-2017 Mercedes-Benz vehicles have a software problem in the communication module that runs the automatic crash notification (eCall) system.
Steering Assist Loss and Possible Fire Risk
The power steering control unit wiring harness may have been damaged during production.
Loose Turbo Oil Lines Can Leak and Cause Fire
Some turbocharged four-cylinder engines may have turbocharger oil feed and return line screws that were not properly tightened.
Rear seatback latch may fail in a crash, raising injury risk
The left-rear seatback latch on certain vehicles may not be strong enough to withstand some loads.
Emergency Call Module May Send Wrong Vehicle Location
A circuit inside the Emergency Call System (eCall) communication module may be damaged, which could cause the system to relay an inaccurate vehicle location in an emergency.
Driver Front Airbag May Not Deploy Properly in a Crash
The driver's side front airbag module may not have been properly bolted down during manufacture.
Software Error Can Disable Automatic Emergency Braking
A software error in the radar sensor control unit may impair the Active Brake Assist system.
Most common 2020 Mercedes-Benz GLC 300 problems
Problem areas named in the 70 complaints owners filed with NHTSA.
| Problem area | Reports |
|---|---|
| Engine | 22 |
| Unknown Or Other | 15 |
| Forward Collision Avoidance | 7 |
| Back Over Prevention | 7 |
| Electrical System | 6 |
| Steering | 5 |
| Exterior Lighting | 5 |
| Power Train | 4 |
| Fuel/Propulsion System | 4 |
| Service Brakes | 3 |
What owners report
On October 23, 2026, my 2020 Mercedes-Benz GLC 300 unexpectedly lost engine power while I was in traffic, without advance warning. When I attempted to restart it, the engine started, shook, and shut off again. A 12-volt battery warning appeared during the incident. On October 26, a dealership representative told me a software issue caused the shutdown and that a software update was needed. They said the update would be performed at no charge, although I would owe a diagnostic fee. I am concerned that the vehicle could lose power without warning again, especially at highway speeds. I am requesting that NHTSA review this incident for a possible safety defect.
My check-engine light recently illuminated, and diagnostic testing identified fault code P06DA00, relating to the oil pump control valve circuit. I have been quoted over $5,000 to replace the oil control valve and oil pump harness. I was quoted the following by Mercedes Servuce in Manchester, NH- Oil Pressure Regulator Valve: need to remove lower oil pan only to access oil control valve and replace the valve and sub harness. $5013.52. This is a known issue. My vehicle has been well maintained, and I have been advised that it is otherwise in excellent mechanical condition. I intend to keep and drive this vehicle for many more years, which makes it particularly disappointing to encounter a re
What component or system failed or malfunctioned, and is it available for inspection upon request? The Forward Collision Avoidance / Active Brake Assist (Automatic Emergency Braking) system failed by falsely identifying a non-existent threat and initiating uncommanded emergency stopping. The vehicle and its onboard control modules are fully available for physical and diagnostic inspection upon request. How was your safety or the safety of others put at risk? While traveling at approximately 35 mph, the vehicle suddenly executed maximum emergency braking with zero warning and no preceding obstacles, vehicles, pedestrians, or road hazards present. The violent deceleration caused maximum seatbe
My 2020 Mercedes-Benz GLC 300 triggered check engine light with code P06DA (engine oil pressure control) at 40,000 miles. The failed component is an oil pressure control sensor/solenoid worth approximately $200. However, due to Mercedes-Benz's engine design (M264 engine), the entire engine must be removed from the vehicle to access and replace this part. Repair estimate from authorized Mercedes-Benz dealership (Mercedes-Benz of Stevens Creek): $8,391. SAFETY CONCERN: Loss of oil pressure can cause catastrophic engine failure while driving. Engine seizure at highway speeds poses serious risk of loss of vehicle control, potential accident, and harm to occupants and other drivers. This is a k
I have had my car for almost two years. This problem has been on-going the whole time. It happens intermittently, I never know. I will be driving it and usually when I am making a turn or pulling onto a main road, you press the gas to go and the car hesitates and makes a loud brooooooooom sound like it is trying to go or figure out what to do and if you are pulling out onto a main road with on comming traffic, this is dangerous. We have seen information that on the 2019 and 2018 GLC300's this has been documented, my car is a 2020 but it's the same thing. It's like the car hesitates and slows down when it should go!
2020 Mercedes-Benz GLC 300 questions
Does the 2020 Mercedes-Benz GLC 300 have any recalls?
Yes. NHTSA lists 16 safety recalls for the 2020 Mercedes-Benz GLC 300: Headlights May Be Aimed Too High, Glaring Oncoming Drivers; Front Roof Panel May Detach, Creating Crash Risk; Emergency call system may fail to connect in a crash; Rearview camera may show no image, raising crash risk; Fuel leak could cause engine fire. Recall repairs are normally free at an authorized dealer.
What are the most common problems with the 2020 Mercedes-Benz GLC 300?
Based on 70 owner complaints filed with NHTSA, the most-reported problem areas are Engine (22), Unknown Or Other (15), Forward Collision Avoidance (7).
How do I check if a recall on my 2020 Mercedes-Benz GLC 300 has been fixed?
Enter your 17-character VIN in our VIN recall check. It shows open recalls that have not been repaired on your specific vehicle. Recall repairs are normally free at an authorized dealer.