The electric parking brake is automatically applied if HOLD or DISTRONIC PLUS brakes the vehicle until it is stationary and at least one of the following conditions is fulfilled:
• the engine is switched off.
• the driver's door is open and the seat belt is not fastened.
• the hood is released.
• the trunk lid is opened while the automatic transmission is in position R.
• the vehicle is stationary for a lengthy period.

The red (USA only) or (Canada only) indicator lamp in the instrument cluster lights up.

In addition to the electric parking brake, P may also be engaged automatically.