How does the Audi A8's four-wheel drive system work?

I'm curious about how the famous Quattro system in the Audi A8 operates. How does it distribute power between the axles and wheels in different driving scenarios?

The Audi A8's Quattro system is designed to continuously redistribute power between the front and rear axles, as well as between the left and right wheels. This allows for maximum traction and stability in any conditions, whether it's wet roads or off-road terrain.

The Quattro system in the Audi A8 uses a center differential to distribute power between the front and rear axles. It also has an available rear sport differential, which can actively distribute power between the rear wheels to improve cornering performance.