What is the BMW 6 Series collision avoidance system and how does it work?

I have heard about the collision avoidance system in the BMW 6 Series, but I am not sure exactly how it works. Can someone explain the technology behind it?

The BMW 6 Series collision avoidance system is called Active Protection and works by using a combination of cameras, radar, and sensors to detect potential collisions and help the driver avoid them. It can also help to mitigate the impact if a collision is unavoidable.

Whenever the system detects a potential collision, it will first give an audible and visual warning to the driver. If no action is taken, it can apply the brakes and even tighten the seatbelts to prepare for impact.