Infiniti QX30 vs Mercedes Benz C Class

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 Infiniti QX30 Mercedes Benz C Class
Complaints on file 100 249
Model years covered 2017–2019 1991–2006
Worst model year — 1995
Best model year — 2000
Crashes reported 5 8
Fires reported 0 16
Injuries reported 4 10
Deaths reported 0 1
Most complained-about part Electrical System Electrical System
Share of complaints involving harm 9% 14.1%

Infiniti QX30 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 18 18.0%
Airbags 16 16.0%
Steering 11 11.0%
Other & Unspecified 9 9.0%
Engine & Cooling 7 7.0%
Transmission & Drivetrain 7 7.0%
Brakes 7 7.0%
Windows, Mirrors & Wipers 6 6.0%

Mercedes Benz C Class by year

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

What breaks

Engine & Cooling 26 10.4%
Fuel & Propulsion 16 6.4%
Transmission & Drivetrain 15 6.0%
Brakes 11 4.4%
Suspension 11 4.4%
Seats 10 4.0%
Airbags 9 3.6%