Functions

Basic Functions: There are two different parking brake functions depending on the operating status of the vehicle.

Locking (Brake Applied):

- With the engine running or the vehicle rolling, the parking brake function acts on the front and rear axle by the DSC hydraulically applying the service brakes.
- When the engine is not running and the vehicle is stationary, the electro-mechanical parking brake is applied.

Dynamic Braking:

- Braking required to decelerate a moving vehicle is identified by the DSC system when the parking brake push button is pressed while driving. The braking procedure is regulated by the DSC hydraulically applying the service brakes and takes place for as long as the push button is pressed.

Automatic Hold: This comfort function is selected using the controller or with the free programmable button on the multifunction steering wheel. After braking to a standstill, the vehicle is held by the DSC hydraulically applying the service brakes. The brakes are released by pressing the accelerator pedal. The hold and release function prevents "creeping" in stop and go traffic and "roll back" before pulling away on an incline (Hill Hold).

Brake Pedal "Feel": The response of the brake pedal may change slightly (accompanied by an activation sound) because the parking brake function is activated using the brake system's hydraulic circuits - this is normal.

Emergency Release: A mechanical emergency release is provided to release the parking brake in the event of an actuating unit failure or a dead battery. It is possible to release the mechanical actuating parking brake unit using the emergency release tool and an open end wrench found in the vehicle tool kit.


NOTE: In addition, refer to the automatic transmission section for the emergency mechanical parking lock release procedure.


Special Function: During vehicle operation, brake lining "seating" is conducted at defined intervals to ensure and maintain the effectiveness of the parking brake. The brake lining seating is performed to remove corrosion from the parking brake shoes and brake drums. The procedure automatically takes place approximately every 1000 km or once a month and is transparent to the driver.