Why does the Audi A8 have a 48V electrical system?

I've noticed that the Audi A8 is equipped with a 48V electrical system, unlike other luxury sedans in its class. Can you explain the technical reason behind this choice and its advantages?

The decision to use a 48V electrical system in the Audi A8 was primarily driven by the need for more power to run the car's advanced features, such as active suspension and electronic turbochargers. This system provides double the voltage found in traditional 12V systems, resulting in increased power and efficiency.

Using a 48V electrical system allows the Audi A8 to utilize a mild-hybrid setup, which recovers energy during deceleration and stores it in a small lithium-ion battery. This energy can then be used to assist the engine during acceleration, resulting in improved fuel efficiency and reduced emissions.

The 48V electrical system in the Audi A8 also allows for the integration of semi-autonomous driving features, such as adaptive cruise control and lane keeping assist. This system can provide up to 40 times more power than a traditional 12V system, enabling the car to handle these advanced technologies.