The primary notion behind the launch of PRE-SAFE® by Mercedes-Benz in 2002 was the fact that valuable seconds are often squandered prior to an accident. PRE-SAFE® (optional extra) is able to utilise this time to great effect. The ESP® and BAS sensory systems can recognise critical driving situations, such as heavy oversteer/understeer, abrupt steering manoeuvres, and panic or emergency braking.

The PRE-SAFE® system evaluates this information and can initiate preventive measures in typical critical situations in order to protect vehicle occupants. The seat belts can be tightened, the front passenger seat moved into a more favourable crash position (in conjunction with the optional memory package), and the side windows can be closed.

The optional PRE-SAFE® brake[1] is a three-level warning and braking system that takes effect before a potential rear-end collision. If the driver fails to react after an initial visual and audible warning, an automatic physical sensation is initiated in the form of a partial braking manoeuvre. If the driver still has not reacted, hard braking is independently initiated as a last step. The BAS PLUS Brake Assist supports the emergency stop by automatically providing the full braking force. PRE-SAFE® underlines Mercedes-Benz's commitment to enhanced road safety based on innovative technologies.