The Automatic Distance control (ADC) technology is similar with the DISTRONIC system from Mercedes-Benz. It is in essence a combination between Cruise Control and a radar based speed control system. When activated, the speed control system can make the car keep a constant distance to another vehicle in front independent of driver input.
If the radar determines an impending frontal crash is unavoidable it emits a collision warning and then automatically slows down the car to avoid it. Newer generations are actually able to bring the vehicle to a full stop behind the car ahead if necessary.