I was wondering what should a "good" compressor sound like?,I didn't think much was wrong with my suspension,just weather affecting the way it drops overnight(see post right rear drops...)Low in rain or humidity, regular in winter and cool nice days and on hot days 3 drop and driver rear does not.But after reading through the suspension forums I am starting to wonder .at start up my compressor is kinda loud but not annoying loud I can just hear it running.but after driving it raises and drives great,no error messages and the bags look o.k...Please give me some good news,I just replaced the rotors and had the sunroof fixed and just renewed tags,I would really like some GOOD news for once.P.s. i replaced the battery in January,but it was the orig. battery