PRE-SAFE® comprises systems which act in an anticipatory manner and take precautionary protection measures. PRE-SAFE® includes, apart from reversible belt tensioners, the automatic closing of the side windows and of the optional sliding sunroof. The air cushions in the newly developed active multicontour seats can also fill up with air within seconds to provide better hold to the driver and front passenger in the event of an imminent collision. Furthermore, if the front passenger seat is equipped with a memory package, PRE-SAFE® can move it into the safest possible position in a hazardous situation.
PRE-SAFE® can be activated, e.g. by events such as emergency braking, heavy oversteer or understeer or rapid steering wheel movements at high vehicle speeds. In conjunction with the (optional) DISTRONIC PLUS short-range radar sensor system[1], PRE-SAFE® can also be activated by the measurements of the radar system when it detects the risk of a collision.