Traction Control Switch: Description and Operation

4541 PSM-off Switch







PSM can be switched off via a switch in the center console (PSM-off switch) to increase driving pleasure. ABD remains active when PSM is switched off to ensure outstanding traction when accelerating out of corners and on surfaces with different friction values.

The vehicle dynamic control can be reactivated in emergency situations by pressing the brake. The PSM 8 is different in that the brake pedal must be pressed with more force than before to activate the system. This affords the sporty driver more scope since gentle pressure on the brake will not result in vehicle dynamic control interventions thus allowing the driver to brake the vehicle into corners. If Sport Chrono is active at the same time, the vehicle dynamic control will intervene at an even later point, i.e. at even higher brake pressure, if necessary.

The system switch-off is indicated to the driver via the PSM function light in the instrument cluster and the indicator light in the PSM switch. A gong also sounds and the text "PSM OFF" appears in the multi-function display in the instrument cluster. The lights go out and the text message "PSM ON" appears when PSM is switched back on. The text messages automatically disappear after 10 seconds, but can also be acknowledged before that using the on-board computer lever.