Air Suspension Problem

[peppers&eggs]

Just bought my 3rd H2 last week. A 2003. My first two did not have the air suspension but this one does. So I am unfamiliar with this set up. I push the button in the dash and nothing happens. I push the button in the back for the compressor and nothing happens. It looks like a light should come on the button in the back but it doesn't. Just seeing if I can get some tips on what to check to see if the system is shot or if there are smaller things I should check / replace before condoning the compressor is shot. I have herd that you should here the compressor kicking on from time to time but never herd it yet. Thanks in advance for any help given.