FaultScore

Mercedes Benz SL vs KIA Carnival Hybrid

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 SL KIA Carnival Hybrid
Complaints on file 57 140
Model years covered 1990–2011 2025–2026
Worst model year
Best model year
Crashes reported 1 3
Fires reported 8 2
Injuries reported 4 2
Deaths reported 0 0
Most complained-about part Electrical System Electrical System
Share of complaints involving harm 22.8% 5%

Mercedes Benz SL by year

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

What breaks

Brakes 4 7.0%
Suspension 3 5.3%
Stability & Traction Control 3 5.3%
Equipment & Accessories 3 5.3%
Engine & Cooling 2 3.5%
Transmission & Drivetrain 2 3.5%
Steering 2 3.5%

KIA Carnival Hybrid 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 23 16.4%
Transmission & Drivetrain 19 13.6%
Fuel & Propulsion 14 10.0%
Other & Unspecified 11 7.9%
Driver Assist & Collision Avoidance 7 5.0%
Brakes 4 2.9%