Dynamic emergency braking

The law requires there to be two operating facilities for the brake system. Alongside the brake pedal, the second operating facility is the parking brake button in the center console. If the parking brake button is pulled upwards whilst driving, dynamic emergency braking defined during the procedure is carried out by means of the Dynamic Stability Control (DSC). This function is intended only for emergencies when the driver can no longer decelerate using the brake pedal.

Other occupants are also able to bring the vehicle to a standstill in this manner, for example if the driver suddenly loses consciousness. During dynamic emergency braking, hydraulic brake pressure is built up at all four wheel brakes. The DSC functions are fully active and the brake lights are activated. This represents a major advantage when compared against manual parking brakes.

Dynamic emergency braking is only carried out as long as the parking brake button is pulled. The deceleration set by the DSC is increased gradually. During dynamic emergency braking, the parking brake indicator lights are activated in the instrument panel. In addition, a Check Control message is output together with an acoustic signal to inform the driver of this special situation. If the driver decelerates by simultaneously pressing the brake pedal and pulling the parking brake button, the DSC control unit prioritizes the requests. The greater deceleration request is converted. If dynamic emergency braking is continued until the vehicle is at a standstill, the vehicle will remain stationary even after the parking brake button has been released. The parking brake indicator lights in the instrument panel remain activated. The driver can then release the parking brake again (see RELEASING THE PARKING BRAKE ).