A6 Allroad c5 (2002) air compressor won't start
 

Hi guys, I have a specific problem and I didn't find anything on the internet about this issue. My 2002 a6 allroad won't turn on the compressor (doesn't light up the up button and I can't hear it working)
the air suspension light is always on, even tho it is on level 1. Also it is slanted on the left side, that is because one of the bags on that side is not that good but I think this is not important for now. What can I check first but keep in mind I don't have access to vag com