How does Audi's advanced safety system protect its A8 passengers from frontal collisions?

I'm considering purchasing an Audi A8 and am curious about the safety features advertised. Can someone provide an explanation of how the car's safety system works to prevent frontal collisions?

The Audi A8 utilizes a combination of radar sensors and cameras to detect potential frontal collisions. If a collision is imminent, the car will automatically apply the brakes and prepare for impact, reducing the severity of the crash.

In addition to automatic braking, the Audi A8 also has a pre-sense system that can detect pedestrians or other hazards in the car's path. If a potential collision is detected, the car will provide visual and audible warnings to the driver.