2019 Mercedes-Benz C 300 engine problems
16 owner complaints filed with NHTSA name the engine on the 2019 Mercedes-Benz C 300 — 24% of all complaints for this model year.
What owners report
“The vehicle experienced a severe safety issue involving a sudden loss of motive power in active traffic. 1. Initial Symptoms & Diagnosis: Recently, the Check Engine Light illuminated. Although the light turned off before my scheduled appointment, I still brought the vehicle to an authorized…”
filed Sep 15, 2026
“Throttle body and accelerator pedal position sensors failed. Component is available for inspection upon request. Independent service center confirmed failure on 1/3/2026 with 6 stored fault codes: P2101, P0122, P0222, P0123, P0223, P2135. Vehicle shuts off while driving without warning at various…”
filed Jul 1, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Engine problems in other C 300 years
| Year | Reports | Share |
|---|---|---|
| 2023 C 300 | 2 | 9% |
| 2022 C 300 | 2 | 8% |
| 2020 C 300 | 8 | 24% |
| 2018 C 300 | 34 | 34% |
| 2017 C 300 | 77 | 36% |
Other reported problem areas on the 2019 Mercedes-Benz C 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.