OK I read all the story about airsuspention there is on the forum. Here is my problem, the rear compressor go on all the time as soon as I start driving but I don't have a leak. I park the car in the garage for the night and the next morning the car still at the same level. If I let the car park for 2 weeks then the car will be lower.
Does anyone had a problem or heard about a problem with the air suspention sensor?
Also sometime I can lift the car to the 4th level and other times it will stop only at the 3rd.

 

Sounds like the compressor is going bad.Sometimes the rings on the piston wear out.Check with Arnott for one

 

I agree with MYD WGN, mine does the same thing... actually i can bearly get up to 3 now.

If you have the tools pull out the compressor. Its an hour job to remove for your first time. I personaly have not ripped my out, but i will be soon, i wonder if i could rebuild it myself...

 

There was a guy who made a cylinder sleave out of a beer can.It was on Audiworld