Mercedes Benz GLS 450 4MATIC vs Pontiac Trans AM

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 GLS 450 4MATIC	Pontiac Trans AM
Complaints on file	79	196
Model years covered	2022–2025	1969–2002
Worst model year	2022	2002
Best model year	2023	1998
Crashes reported	18	18
Fires reported	1	6
Injuries reported	4	9
Deaths reported	0	2
Most complained-about part	Driver Assist & Collision Avoidance	Brakes
Share of complaints involving harm	29.1%	17.9%

Mercedes Benz GLS 450 4MATIC by year

28 16 22 13

22 23 24 25

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

What breaks

Driver Assist & Collision Avoidance 17 21.5%

Other & Unspecified 11 13.9%

Electrical System 10 12.7%

Engine & Cooling 9 11.4%

Brakes 8 10.1%

Transmission & Drivetrain 4 5.1%

Wheels 4 5.1%

Acceleration & Cruise Control 3 3.8%

Pontiac Trans AM by year

1 2 1 1 2 10 10 3 1 1 2 10 1 13 5 8 14 22 23 13 10 43

69 77 79 80 82 84 86 87 88 89 91 92 93 94 95 96 97 98 99 00 01 02

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

What breaks

Brakes 24 12.2%

Engine & Cooling 23 11.7%

Transmission & Drivetrain 18 9.2%

Body & Structure 17 8.7%

Electrical System 13 6.6%

Steering 13 6.6%

Lights 13 6.6%

Fuel & Propulsion 13 6.6%