2021 Mercedes-Benz GLC 300 exterior lighting problems
13 owner complaints filed with NHTSA name the exterior lighting on the 2021 Mercedes-Benz GLC 300 — 20% of all complaints for this model year.
What owners report
“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…”
filed Sep 11, 2026
“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…”
filed Sep 10, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- Headlights may be incorrectly adjusted too high and create a glare for oncoming trafficCampaign 24V070000 · Feb 2, 2024
- Electrical connection for the headlights may not be watertight, which can result in…Campaign 22V261000 · Apr 15, 2022
Exterior Lighting problems in other GLC 300 years
| Year | Reports | Share |
|---|---|---|
| 2024 GLC 300 | 3 | 14% |
| 2023 GLC 300 | 10 | 18% |
| 2020 GLC 300 | 5 | 7% |
| 2018 GLC 300 | 1 | 1% |
Other reported problem areas on the 2021 Mercedes-Benz GLC 300
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.