What are Audi A8's key safety features to protect passengers?

I am considering buying an Audi A8 for my family, but I want to make sure it has top-notch safety features. What are some specific features I should look out for and how do they work?

One of Audi A8's key safety features is the pre sense® city system, which can detect potential collisions with vehicles, pedestrians, and cyclists in front of the car. It can then automatically apply the brakes to avoid or mitigate the impact.