Why does the Audi A8 have a 48-volt primary electrical system?

I've noticed that the Audi A8 is one of the few vehicles on the market with a 48-volt primary electrical system instead of the usual 12-volt system. What is the reasoning behind this design choice and what are the benefits for the car's performance and efficiency?

The 48-volt primary electrical system in the Audi A8 is a part of the car's mild-hybrid technology. This allows the car to seamlessly switch between its gasoline engine and electric motor, providing a smoother and more efficient driving experience.

The higher voltage of the primary electrical system allows for faster and more powerful charging of the car's battery. This results in a longer range for the car's electric motor and improved fuel efficiency overall.

Having a 48-volt primary electrical system also allows for the integration of advanced features such as active suspension and energy recuperation. This helps improve the car's handling and braking performance while also reducing strain on the engine.