Very rarely, if you not lowering or raising the car regularly you will hardly ever hear the compressor unless you have a LPG conversion. Apart from anything else its very quiet in operation and well insulated.yellowfever said:Does the MKIII "adjust" itself? What I mean by this is I just traded from a P38 to a 06 RR. The P38 did a lot of suspension adjusting. Self leveling when parked and lower itself a noticeable amount on the freeway. The compressor ran a lot. I don't notice the MKIII raising or lowering itself at all nor do I hear the compressor running much. Although it is a lot quieter. I do hear it sometimes when I start up in the morning.