FaultScore

Mazda MAZDASPEED6 vs Mercedes Benz CLS550

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 Mazda MAZDASPEED6 Mercedes Benz CLS550
Complaints on file 33 82
Model years covered 2006–2007 2006–2009
Worst model year 2007
Best model year 2006
Crashes reported 2 1
Fires reported 0 1
Injuries reported 2 4
Deaths reported 0 0
Most complained-about part Transmission & Drivetrain Fuel & Propulsion
Share of complaints involving harm 12.1% 7.3%

Mazda MAZDASPEED6 by year

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

What breaks

Transmission & Drivetrain 14 42.4%
Engine & Cooling 9 27.3%
Airbags 5 15.2%
Suspension 2 6.1%
Body & Structure 1 3.0%
Lights 1 3.0%
Other & Unspecified 1 3.0%

Mercedes Benz CLS550 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 6 7.3%
Transmission & Drivetrain 6 7.3%
Electrical System 6 7.3%
Suspension 6 7.3%
Airbags 5 6.1%
Brakes 4 4.9%
Other & Unspecified 4 4.9%