Audi pre sense rear uses data from the radar sensors in the rear of the vehicle and calculates, within system limits, the probability of a rear-end collision with the vehicle behind. Where the risk of a collision with the vehicle behind is detected, preventive protection measures are initiated: tensioning of the front seat belts and the outer rear seat belts, optimisation of the seat position, closing the windows and the panoramic glass sunroof and flashing the hazard warning lights at high frequency to warn other road users.

Audi driver assistance systems work only within system limits and intended to assist the driver. The driver remains responsible for driving the vehicle and is required to remain attentive at all times.