Mercedes Benz GLK350 vs Pontiac Bonneville

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 GLK350	Pontiac Bonneville
Complaints on file	1,046	2,580
Model years covered	2006–2015	1977–2005
Worst model year	2015	1998
Best model year	2011	2004
Crashes reported	58	135
Fires reported	20	180
Injuries reported	33	117
Deaths reported	6	0
Most complained-about part	Airbags	Engine & Cooling
Share of complaints involving harm	11.2%	16.7%

Mercedes Benz GLK350 by year

4 5 3 280 151 188 160 120 135

06 07 08 10 11 12 13 14 15

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

What breaks

Airbags 624 59.7%

Fuel & Propulsion 89 8.5%

Brakes 37 3.5%

Electrical System 36 3.4%

Steering 34 3.3%

Other & Unspecified 32 3.1%

Body & Structure 27 2.6%

Suspension 25 2.4%

Pontiac Bonneville by year

1 4 2 2 1 1 2 3 24 20 35 45 26 139 183 123 330 181 188 359 176 301 179 113 67 38 37

77 78 79 81 82 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05

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

What breaks

Engine & Cooling 615 23.8%

Electrical System 324 12.6%

Brakes 256 9.9%

Steering 218 8.4%

Transmission & Drivetrain 171 6.6%

Fuel & Propulsion 169 6.6%

Airbags 150 5.8%

Windows, Mirrors & Wipers 133 5.2%