How does the all-wheel steering system in the Audi A6 work?

I've heard that the Audi A6 has a unique all-wheel steering system. Can you explain how it works and what benefits it offers compared to traditional steering systems?

The Audi A6 uses a rear-axle steering system, where the rear wheels can turn in the same direction as the front wheels at lower speeds to improve maneuverability, and in the opposite direction at higher speeds for stability. This allows for sharper turns at low speeds and better cornering stability at higher speeds.