Mercedes Benz SL vs BMW X4
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 | BMW X4 |
|---|---|---|
| Complaints on file | 57 | 140 |
| Model years covered | 1990–2011 | 2015–2025 |
| Worst model year | — | 2015 |
| Best model year | — | 2016 |
| Crashes reported | 1 | 17 |
| Fires reported | 8 | 8 |
| Injuries reported | 4 | 4 |
| Deaths reported | 0 | 0 |
| Most complained-about part | Electrical System | Engine & Cooling |
| Share of complaints involving harm | 22.8% | 20.7% |
Mercedes Benz SL by year
What breaks
Electrical System
30
52.6%
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%
BMW X4 by year
What breaks
Engine & Cooling
28
20.0%
Electrical System
28
20.0%
Brakes
14
10.0%
Other & Unspecified
14
10.0%
Transmission & Drivetrain
11
7.9%
Driver Assist & Collision Avoidance
8
5.7%
Airbags
7
5.0%
Suspension
6
4.3%