Originally Posted by JCL

Search this forum on "air suspension error". You will get pages of threads.

Your first step in diagnosing it is to get the codes read, otherwise you are searching blindly for what the cause may be. Possibilities include the air compressor, wiring harness, or any of the level sensors.

Here is one thread to get you started:

http://www.xoutpost.com/bmw-sav-foru...pears-why.html