Mercedes Benz GLC300 vs KIA K5

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 Mercedes Benz GLC300 KIA K5
Complaints on file 306 765
Model years covered 2016–2017 2021–2026
Worst model year — 2022
Best model year — 2026
Crashes reported 20 56
Fires reported 6 14
Injuries reported 11 52
Deaths reported 0 4
Most complained-about part Engine & Cooling Fuel & Propulsion
Share of complaints involving harm 12.1% 16.5%

Mercedes Benz GLC300 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 80 26.1%
Brakes 31 10.1%
Airbags 22 7.2%
Transmission & Drivetrain 13 4.2%
Windows, Mirrors & Wipers 13 4.2%

KIA K5 by year

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

What breaks