What driver assistance features does the Audi A8 have?

I'm interested in purchasing an Audi A8 and would like to know more about the car's driver assistance features. Can you tell me about the different technologies that are included and how they work?

The Audi A8 comes with adaptive cruise control, which uses radar and camera sensors to maintain a safe distance from the car ahead. It also has lane departure warning and intervention, which can alert you if you're drifting out of your lane and even steer the car back into its lane if necessary.