Why does the Audi A6 have four-wheel steering?

I've noticed that the Audi A6 has an interesting feature of four-wheel steering. How does this system work and what benefits does it offer?

The four-wheel steering system in the Audi A6 allows the rear wheels to turn in the opposite direction of the front wheels at low speeds, making the car more agile and easier to maneuver in tight spaces.

At higher speeds, the rear wheels turn in the same direction as the front wheels, providing improved stability and handling while cornering. It also helps reduce the turning radius of the car.

The four-wheel steering system in the Audi A6 is especially useful for parking and navigating through city traffic. It also enhances the overall driving experience and makes the car feel more dynamic on the road.