2022 Mercedes-Benz GLC 300 engine problems
10 owner complaints filed with NHTSA name the engine on the 2022 Mercedes-Benz GLC 300 — 17% of all complaints for this model year.
What owners report
“My 2022 Mercedes-Benz GLC 300 (17,700 total miles) suffered a catastrophic structural engine block failure and an explosive loss of propulsion while driving at highway speeds. This occurred exactly 6 days and 183 miles after a franchised Mercedes-Benz dealership performed the official fuel pump…”
filed Aug 8, 2026
“While driving down a busy neighborhood street 2 lanes with cars on both sides making it a 1 lane road pulled over to the side a little to let cars pass. All of a sudden ALL electrical and engine stopped and turned off. Only thing that was powered was instrument cluster with multiple warnings like…”
filed Jul 3, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Engine problems in other GLC 300 years
| Year | Reports | Share |
|---|---|---|
| 2024 GLC 300 | 7 | 33% |
| 2023 GLC 300 | 15 | 27% |
| 2021 GLC 300 | 30 | 45% |
| 2020 GLC 300 | 21 | 30% |
| 2019 GLC 300 | 11 | 24% |
| 2018 GLC 300 | 28 | 32% |
Other reported problem areas on the 2022 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.