Air ride suspension on 2001 a4 quattro wagon?
 

Hi, I have a 2001 a4 quattro wagon. Absolutely love the car but never really knew how to control how high or how much air you can use in the suspension. Problem is now that the car sits so low that it's almost unbearable to ride in from every bump. Don't get me wrong, the car looks awesome like it was rubbed or something but just doesn't ride right? How do I raise it back up and get air back in the suspension bags? I'm not familiar with this car really. Only had it for about 6 months as a daily driver everyday up and down the highway about 120 miles a day. Any help would be great! Thanks in advance.