What is the Audi A6's all-wheel drive system and how does it improve performance?

I've heard that the Audi A6 has a unique all-wheel drive system. Can you explain how it works and how it enhances the car's performance?

The Audi A6 comes equipped with the quattro all-wheel drive system, which utilizes sensors to constantly monitor the road conditions and distribute power to the wheels with the most traction. This not only improves the car's handling and grip on the road, but also enhances its stability and control.