Worst years for a Mercedes Benz C 300
Owners have filed 669 complaints about the Mercedes Benz C 300 with NHTSA across model years 2017 to 2026. More of them are about the engine & cooling than anything else.
Avoid
2017 Mercedes Benz C 300286 complaints — the highest FaultScore of any year, mostly engine & cooling.
Cleanest on record
2021 Mercedes Benz C 30016 complaints — the lowest FaultScore of the graded years.
Every Mercedes Benz C 300 year, graded
The grade compares each year against the rest of this model's own run — never against another car. Click any bar or row to open that year's report.
| Year | Grade | Complaints | Crashes | Fires | Median miles | Most reported |
|---|---|---|---|---|---|---|
| 2026 | — | 1 | 0 | 0 | — | Acceleration & Cruise Control |
| 2025 | — | 7 | 0 | 0 | — | Driver Assist & Collision Avoidance |
| 2024 | C | 20 | 5 | 0 | — | Electrical System |
| 2023 | C | 36 | 3 | 0 | 6,000 | Driver Assist & Collision Avoidance |
| 2022 | C | 39 | 2 | 0 | 6,000 | Driver Assist & Collision Avoidance |
| 2021 | A | 16 | 0 | 0 | — | Engine & Cooling |
| 2020 | D | 48 | 7 | 0 | 28,722 | Engine & Cooling |
| 2019 | C | 88 | 5 | 0 | 19,500 | Engine & Cooling |
| 2018 | D | 128 | 9 | 0 | 50,000 | Engine & Cooling |
| 2017 | F | 286 | 17 | 5 | 29,650 | Engine & Cooling |
What breaks on a Mercedes Benz C 300
Across every model year on file. Follow a row for that part's complaints and the year it was worst.
Worst in 2017
Worst in 2019
Worst in 2017
Worst in 2019
Worst in 2017
Exactly what failed on a Mercedes Benz C 300
The named sub-assemblies behind those complaints, across every model year.
Complaints filed over time
Every complaint about every Mercedes Benz C 300, by the month it reached NHTSA.
Mercedes Benz C 300 problems by state
Where owners filed from. Heavier states are usually just bigger markets, but a part that fails in heat or salt shows up here first.
Compare the Mercedes Benz C 300
Side by side on complaint history. Remember that raw totals track how many were sold as much as how good they were.