2021 Mercedes-Benz GLC problems and complaints
Owners have filed 67 complaints with NHTSA about the 2021 Mercedes-Benz GLC. The most-reported areas: Engine (30), Exterior Lighting (13), Fuel/Propulsion System (10).
Key takeaways
- 67 owner complaints on file with NHTSA.
- 2 involve a crash, 2 a fire, 1 reported injury.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Engine | 30 | 45% |
| Exterior Lighting | 13 | 19% |
| Fuel/Propulsion System | 10 | 15% |
| Electrical System | 8 | 12% |
| Unknown Or Other | 7 | 10% |
| Power Train | 4 | 6% |
| Back Over Prevention | 3 | 4% |
| Visibility/Wiper | 3 | 4% |
| Forward Collision Avoidance | 3 | 4% |
| Structure | 3 | 4% |
| Lane Departure | 2 | 3% |
| Fuel System | 2 | 3% |
One complaint can name several components, so shares add up to more than 100%.
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2021 Mercedes-Benz GLC SUV RWD | 5/5 | 5/5 | 5/5 | 4/5 |
| 2021 Mercedes-Benz GLC SUV 4WD | 5/5 | 5/5 | 5/5 | 4/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Lane Departure - filed 2026-10-05
The contact owns a 2021 Mercedes-Benz GLC 300. The contact stated while driving 10 MPH, the blind spot assist detection feature failed to function as intended. The contact stated while inspecting the vehicle, the contact confirmed that the blind spot assist feature was enabled. In addition, the failure occurred after t...
Exterior Lighting - filed 2026-09-11
I own a 2021 Mercedes-Benz GLC 300. The vehicle developed moisture/condensation in the headlamp, and the affected headlamp subsequently failed. I took the vehicle to RBM of Alpharetta, an authorized Mercedes-Benz dealership. I was advised that corrosion was found in the affected headlamp and that the headlamp assembly...
Exterior Lighting - filed 2026-09-10
My vehicle is experiencing moisture intrusion caused by a defective headlight housing seal. The water intrusion has resulted in a short circuit and failure of the turn signal module within the headlamp assembly. I am aware of NHTSA Safety Recall 22V-261, which addresses a substantially similar defect involving inadequ...
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More for the 2021 Mercedes-Benz GLC
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.