If danger of a rear-end collision is detected, PRE-SAFE® PLUS flashes the rear hazard warning lights at a high frequency to warn the driver following behind. It also initiates the preventive PRE-SAFE® occupant protection measures, such as the reversible belt tensioners, for example, to hold driver and front passenger in place and prepare them better for the event of a crash.

If the vehicle is stationary, PRE-SAFE® PLUS can lock the vehicle's brakes to reduce the extent to which it is jolted forward. This can also help to considerably reduce the load on the occupants, including the risk of so-called whiplash trauma.