See also:

Problems with the SmartKey
Problem Possible causes/consequences and Solutions You cannot lock or unlock the vehicle using the SmartKey. The SmartKey battery is discharged or nearly discharged. - ...

Heavy and light loads
WARNING Depressing the brake pedal constantly results in excessive and premature wear to the brake pads. It may also cause the brakes to overheat, seriously impairing their effectiveness. It ...

Deactivating/activating PARKTRONIC
1 To deactivate/activate PARKTRONIC 2 Indicator lamp If indicator lamp 2 lights up, PARKTRONIC is deactivated. PARKTRONIC is automatically activated when you turn the SmartKey to position ...