2018 Audi S5 vs 2018 Mercedes-Benz C 300
Complaints, recalls, TSBs, investigations and safety ratings side by side, from official federal data. Last verified Aug 8, 2026. Raw complaint counts are not adjusted for sales volume.
| Metric | 2018 Audi S5 | 2018 Mercedes-Benz C 300 |
|---|---|---|
| NHTSA complaints | 26 | 97 |
| Recall campaigns | 2 | 18 |
| Service bulletins (TSBs) | 791 | 173 |
| Investigations | 0 | 1 |
| Crash reports | 2 | 4 |
| Fire reports | 0 | 0 |
| NCAP overall rating | — | — |
| EPA MPG (combined) | 24 | 25–27 |
| Median reported incident mileage | — | — |
Reported problems side by side
| Component | Audi S5 | Mercedes-Benz C 300 |
|---|---|---|
| Engine | 9 | 34 |
| Steering | 1 | 12 |
| Structure | 1 | 12 |
| Electrical System | 2 | 10 |
| Fuel/propulsion System | 1 | 9 |
| Air Bags | 3 | 4 |
| Forward Collision Avoidance | 1 | 4 |
| Power Train | 2 | 2 |
Symptoms owners describe
| Check engine light | 0 | 12 |
| Stalling | 0 | 5 |
2018 Audi S5
2018 Mercedes-Benz C 300
Compare all Audi S5 vs Mercedes-Benz C 300 years →
Method. Complaints are unique NHTSA reports. A vehicle that sold more units will naturally accumulate more complaints — use shares and read the underlying reports before drawing conclusions.