BMW 530IA 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 BMW 530IA Mercedes Benz CLS550
Complaints on file 34 84
Model years covered 1994–2003 2006–2009
Worst model year — 2007
Best model year — 2006
Crashes reported 1 1
Fires reported 7 1
Injuries reported 1 4
Deaths reported 0 0
Most complained-about part Airbags Fuel & Propulsion
Share of complaints involving harm 26.5% 7.1%

BMW 530IA by year

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

What breaks

Airbags 11 32.4%
Engine & Cooling 10 29.4%
Transmission & Drivetrain 6 17.6%
Seats 3 8.8%
Electrical System 2 5.9%
Acceleration & Cruise Control 1 2.9%
Fuel & Propulsion 1 2.9%

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 7.1%
Transmission & Drivetrain 6 7.1%
Electrical System 6 7.1%
Suspension 6 7.1%
Airbags 5 6.0%
Brakes 5 6.0%
Other & Unspecified 4 4.8%