What does the Audi A8's adaptive air suspension do?

I'm considering purchasing an Audi A8 and I've heard about its adaptive air suspension system. Can you explain what it does and if it's worth the extra cost?

The adaptive air suspension in the Audi A8 automatically adjusts the ride height and stiffness depending on the driving conditions. For example, during highway driving, it will lower the car to improve aerodynamics and fuel efficiency. In turn, during cornering or off-road driving, it will increase stiffness for better handling and control.

As a long-time owner of an Audi A8 with adaptive air suspension, I can tell you that it's definitely worth the extra cost. The system provides a smooth and comfortable ride, even on rough roads. Plus, it increases the overall stability and handling of the car.