Mercedes-Benz M-Class (W164)

Engines

Click the links below to see common problems specific to the engines available on this vehicle.

Harsh downshifts from 2nd to 1st gear – may require a software upgrade and/or revised valve body
Upper steering shaft bearing – causes snapping or groaning noises from steering column when turning
Dashboard warnings about the suspension and brakes may be due to abrasion of the front wheel speed sensor wires
Steering wheel buttons – may stop working because of an internal short circuit, requires a replacement steering wheel
Door mirrors – may not fully open or retract due to a loose electrical connection or lack of lubrication
Interior temperature may differ from the climate control system because the sun sensor needs to be adjusted

Vehicles with heated front seats: Signal acquisition module can fail
Vehicles with Airmatic air suspension:
- Can experience miscellaneous hardware failures
- Wiring harness insulation can rub off and cause short-circuiting
Vehicles with power liftgate: Liftgate may reverse directions when closing due to a loose bolt on the gas strut