2018 Audi A3 vs 2018 Mercedes-Benz C 300
Complaints, recalls, TSBs, investigations and safety ratings side by side, from official federal data. Last verified Sep 22, 2026. Raw complaint counts are not adjusted for sales volume.
| Metric | 2018 Audi A3 | 2018 Mercedes-Benz C 300 |
|---|---|---|
| NHTSA complaints | 33 | 99 |
| Recall campaigns | 2 | 18 |
| Service bulletins (TSBs) | 632 | 183 |
| Investigations | 1 | 1 |
| Crash reports | 1 | 4 |
| Fire reports | 0 | 0 |
| NCAP overall rating | 5/5 | — |
| EPA MPG (combined) | 29 | 25–27 |
| Median reported incident mileage | — | — |
Reported problems side by side
| Component | Audi A3 | Mercedes-Benz C 300 |
|---|---|---|
| Engine | 4 | 34 |
| Air Bags | 17 | 4 |
| Fuel/propulsion System | 5 | 9 |
| Electrical System | 4 | 10 |
| Structure | 0 | 14 |
| Steering | 0 | 12 |
| Power Train | 4 | 2 |
| Tires | 3 | 2 |
Symptoms owners describe
| Check engine light | 0 | 12 |
| Stalling | 0 | 5 |
2018 Audi A3
2018 Mercedes-Benz C 300
Compare all Audi A3 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.