FaultScore

Audi S4 vs Mercedes Benz C300

Both cars' complete complaint records, side by side.

Read the totals carefully. NHTSA publishes no sales figures, so the car that sold more collects more complaints regardless of quality. The rows worth weighing are the proportions — the share of complaints that involved harm, and which part dominates.

Measure Audi S4 Mercedes Benz C300
Complaints on file 721 1,788
Model years covered 1992–2022 2008–2009
Worst model year 2001
Best model year 1993
Crashes reported 23 47
Fires reported 8 53
Injuries reported 10 41
Deaths reported 0 0
Most complained-about part Electrical System Airbags
Share of complaints involving harm 5.7% 7.9%

Audi S4 by year

Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade: A B C D F ungraded

What breaks

Electrical System 150 20.8%
Brakes 82 11.4%
Engine & Cooling 72 10.0%
Lights 66 9.2%
Tires 51 7.1%
Steering 37 5.1%
Airbags 33 4.6%

Mercedes Benz C300 by year

Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade: A B C D F ungraded

What breaks

Airbags 459 25.7%
Electrical System 428 23.9%
Steering 273 15.3%
Lights 228 12.8%
Suspension 49 2.7%
Brakes 38 2.1%