How does Audi's all-wheel steering system work in the A7?

I've heard that the Audi A7 has a unique steering system that improves handling and stability. Can you explain how this system works?

The Audi A7's all-wheel steering system, also known as rear-axle steering, uses electromechanical actuators to turn the rear wheels in the same direction as the front wheels at high speeds for improved stability and handling. At lower speeds, the rear wheels turn in the opposite direction for easier maneuvering and a smaller turning radius.

In the Audi A7, the all-wheel steering system works in conjunction with the dynamic steering system to provide precise and responsive handling. The rear wheels can turn up to 5 degrees, improving cornering and stability while also enhancing safety by reducing the risk of oversteering.