2023 Mercedes-Benz GLC 300 engine problems
15 owner complaints filed with NHTSA name the engine on the 2023 Mercedes-Benz GLC 300 — 27% of all complaints for this model year.
What owners report
“Vehicle has a significant engine oil leak without being driven. Engine oil electronic meter still shows engine oil to be in "Ok" range. Vehicle is 2023 with only 19680 miles and is rarely driven till the last 2 months. Other 2023 Model Year MB GLC300's manufactured at the same Bremen Germany plant…”
filed Sep 7, 2025
“First of all, this is a new car produced in 2023. Since I bought it, the engine has shown alarms more than four times. Every time I went to the 4S shop, no problems were found. Today, the engine still shows a yellow alarm. Secondly, the brake disc makes a loud noise when I park the car and then…”
filed Jun 22, 2024
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- Incorrect screws, installed on the high-pressure fuel pump, may prevent a proper seal…Campaign 23V878000 · Dec 21, 2023
Engine problems in other GLC 300 years
| Year | Reports | Share |
|---|---|---|
| 2024 GLC 300 | 7 | 33% |
| 2022 GLC 300 | 9 | 16% |
| 2021 GLC 300 | 29 | 48% |
| 2020 GLC 300 | 20 | 30% |
| 2019 GLC 300 | 11 | 24% |
| 2018 GLC 300 | 28 | 32% |
Other reported problem areas on the 2023 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.