The brake light switch informs the ABS/DSC control unit of when the brake pedal is operated. This results in immediate termination of any brake intervention during an DSC control function thus improving the control comfort.
Faults in the brake light switch circuit are stored in the defect code memory, however, the ABS safety lamp is not activated.
The handbrake switch informs the ABS/DSC control unit that the handbrake is applied. This results in an increase in the threshold for the engine drag torque control (MSR) thus improving the control comfort.
The DSC function can be switched off with the DSC passive button. This is indicated by a multifunction lamp lighting in the instrument cluster. The ABS control function, however, is still operable.
The DSC function is reactivated by pressing the button again as long as the difference between the maximum rear wheel speed and minimum front wheel speed is less than 20 km/h.