Mercedes-Benz C 300: which model years draw the most owner complaints?
3,972 complaints filed with NHTSA about the Mercedes-Benz C 300, model years 2008 to 2026. 3 model years stand out for the engine or transmission: 2015 (engine 13×); 2016 (engine 9.5×); 2017 (engine 7.8×). Quietest mature years by complaint count: 2019, 2014, 2018. Counts of unverified owner reports, compared only with other years of the same model; not failure rates.
Complaints by model year
| MODEL YEAR | COMPLAINTS | VS OTHER YEARS | STANDS OUT | RECALLS |
|---|---|---|---|---|
| 2008 C 300 | 672 | — | 7 | |
| 2009 C 300 | 575 | — | 8 | |
| 2010 C 300 | 453 | — | 6 | |
| 2011 C 300 | 480 | — | 6 | |
| 2012 C 300 | 267 | — | 6 | |
| 2013 C 300 | 261 | — | 6 | |
| 2014 C 300FEW REPORTS | 94 | quiet: 2 of 12 | 5 | |
| 2015 C 300 | 382 | engine 13× | 11 | |
| 2016 C 300 | 291 | engine 9.5× | 13 | |
| 2017 C 300 | 216 | engine 7.8× | 15 | |
| 2018 C 300FEW REPORTS | 99 | quiet: 3 of 12 | 18 | |
| 2019 C 300FEW REPORTS | 69 | quiet: 1 of 12 | 17 | |
| 2020 C 300FEW REPORTS | 34 | — | 9 | |
| 2021 C 300FEW REPORTS | 15 | — | 7 | |
| 2022 C 300FEW REPORTS | 25 | — | 9 | |
| 2023 C 300FEW REPORTS | 22 | — | 9 | |
| 2024 C 300FEW REPORTS | 11 | — | 3 | |
| 2025 C 300FEW REPORTS | 4 | — | 2 | |
| 2026 C 300FEW REPORTS | 2 | — | 1 |
"Stands out" = 40 or more complaints naming that system and at least twice the model's quiet (lower-quartile) year, or twice the share seen across every vehicle of that model year. Newer years have had less time on the road. "Quiet" ranks only years with 7+ years on the road and 20+ complaints. NHTSA data through November 2026.
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Other Mercedes-Benz models
Mercedes-Benz AMG E 55 · Mercedes-Benz C 230 · Mercedes-Benz C 250 · Mercedes-Benz C 320 · Mercedes-Benz C 350 · Mercedes-Benz CLA 250 · Mercedes-Benz E 300 · Mercedes-Benz E 320 · Mercedes-Benz E 350 · Mercedes-Benz E 500 · Mercedes-Benz E 550 · Mercedes-Benz GL 450 · Mercedes-Benz GLA 250 · Mercedes-Benz GLC 300 · Mercedes-Benz GLE 350 · Mercedes-Benz GLK 350 · Mercedes-Benz ML 320 · Mercedes-Benz ML 350 · Mercedes-Benz Metris · Mercedes-Benz R 350 · Mercedes-Benz S 430 · Mercedes-Benz S 500 · Mercedes-Benz S 550 · Mercedes-Benz S Class · Mercedes-Benz SL 500 · Mercedes-Benz Sprinter 2500 · Mercedes-Benz Sprinter 3500. All makes and models.
Source: NHTSA public complaints, recalls, service bulletin and investigation databases, data received through November 2026. Complaints are unverified reports from owners, not failure rates: sales volumes are unknown, so a model year is only compared with other years of the same model. Not a diagnosis and not financial advice. PulsCar is not affiliated with NHTSA. Year pages: 200820092010201120122013201520162017