Audi S5 vs Mercedes-Benz C 300
Owner complaints, worst years and recall history side by side, from official NHTSA data. Last verified Aug 8, 2026. Raw complaint counts are not adjusted for sales volume.
Audi S5
- Total complaints
- 71
- Avg per model year
- 12
- Recall campaigns (all years)
- 14
- Most complained year
- 2018 (26)
Top problems: Unknown OR Other, Electrical System, Engine
Mercedes-Benz C 300
- Total complaints
- 457
- Avg per model year
- 54
- Recall campaigns (all years)
- 46
- Most complained year
- 2017 (215)
Top problems: Engine, Unknown OR Other, Electrical System
Method. Complaints are unique NHTSA reports per model year. A model that sold more units will naturally accumulate more complaints — compare the shape across years, not just the raw totals, and read the year pages for what actually fails.