repaired · 2025 Q4
Exterior lighting: headlights
Risk. Incorrectly aimed headlights can reduce the visibility of oncoming traffic, increasing the risk of a crash.
2020 Mercedes-Benz GLC 300Problems, recalls & complaints
NHTSA has logged 70 owner complaints about the 2020 Mercedes-Benz GLC 300, most often about the engine. It is covered by 16 safety recalls, and for recall 23V-854 the manufacturer reports only 41% of affected cars repaired.
Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through October 26, 2026. Updated daily. Photo: Mr.choppers, CC BY-SA 3.0.
Complaints by system
Where the 2020 Mercedes-Benz GLC 300 has problems
70 complaints grouped by the system owners reported.
22Engine
7Back over prevention
6Electrical system
6Forward collision avoidance1 crash/fire/injury
5Exterior lighting
5Steering1 crash/fire/injury
4Fuel/propulsion system
4Power train
3Service brakes
139 other systems1 crash/fire/injury
| System | Complaints | Crash, fire or injury |
|---|---|---|
| Engine | 22 | 0 |
| Back over prevention | 7 | 0 |
| Electrical system | 6 | 0 |
| Forward collision avoidance | 6 | 1 |
| Exterior lighting | 5 | 0 |
| Steering | 5 | 1 |
| Fuel/propulsion system | 4 | 0 |
| Power train | 4 | 0 |
| Service brakes | 3 | 0 |
| 9 other systems | 13 | 1 |
Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.
16 recalls
2020 Mercedes-Benz GLC 300 recalls and how many were fixed
Each ring shows the share of affected cars repaired, from the manufacturer’s latest quarterly report to NHTSA. Recall repairs are free at authorized dealers.
repaired · 2025 Q4
Body: roof and pillars
Risk. A detached roof panel can become a road hazard, increasing the risk of a crash.
repaired · 2026 Q2
Communication: auto crash notification
Risk. A disabled eCall system would prevent a vehicle occupant from contacting the emergency services call center in an emergency, potentially delaying emergency…
repaired · 2024 Q2
Back over prevention: display function
Risk. An inoperable rearview camera display reduces the driver's rear view, increasing the risk of a crash.
Show 12 more recalls
repaired · 2024 Q1
Fuel injection system: fuel rail
Risk. A fuel leak in the presence of an ignition source, such as hot engine or exhaust components, can increase the risk of a fire.
repaired · 2023 Q2
Sensor: side impact
Risk. Air bags and seatbelts that don't function as intended can increase the risk of injury during a crash.
repaired · 2023 Q4
Sensing system: camera
Risk. A backup camera that displays a blank image reduces the driver's rear view, increasing the risk of a crash or injury.
repaired · 2023 Q3
Body: roof and pillars
Risk. The adhesive bonding of the front panel might deteriorate, possibly causing the front panel to detach from the vehicle and become a road hazard, increasing the…
repaired · 2023 Q3
Communication
Risk. A disabled eCall system would prevent a vehicle occupant from contacting emergency services through the call center in an emergency, potentially delaying…
repaired · 2023 Q4
Communication: auto crash notification
Risk. Failure of the eCall system may result in emergency responders being dispatched to the wrong location, increasing the risk of injury following a crash.
repaired · 2022 Q3
Steering: electric power assist system
Risk. A loss of power steering assist can increase the risk of a crash.
repaired · 2022 Q3
Gasoline: turbo/supercharger
Risk. An oil leak in the presence of an ignition source such as hot engine or exhaust components can increase the risk of a fire.
repaired · 2022 Q2
Seats: mid/rear assembly
Risk. In the event of a crash, if the left-rear seatback latch fails, it can increase the risk of injury.
repaired · 2022 Q1
Communication
Risk. An inaccurate vehicle location may delay emergency responders, increasing the risk of injury.
repaired · 2022 Q2
Driver side: inflator module
Risk. In the event of a crash necessitating deployment of the driver's front airbag, the airbag may not deploy properly, increasing the risk of injury.
repaired · 2020 Q4
Sensing system: radar
Risk. An impaired Active Brake Assist may not automatically apply partial or full braking as expected, increasing the risk of a crash.
Recalls apply to specific cars. To see whether a recall is still open on yours, enter the 17-character VIN at nhtsa.gov/recalls or with Mercedes-Benz.
Best & worst years
2020 vs. every other GLC 300 year
Bars show complaints per model year. Colors show the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the GLC 300 median. How we score
'16'17'18'19'20'21'22'23'24'25'26
- Avoid
- Caution
- Solid
- Best
- Not rated
1 investigation
NHTSA defect investigations
Federal investigations that included the 2020 Mercedes-Benz GLC 300, and the recalls they led to.
- Front Roof Panel DetachmentLed to recall 21V-197
In owners' words
What GLC 300 owners report
Recent engine complaints filed with NHTSA, shortened. Personal details are removed.
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…
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-…
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…
Own a 2020 GLC 300?
Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.