I hear of a lot of people saying that they get their self leveling Xs lowered through DIS. I never asked the previous owner and I can't track him down but I wonder if he had it lowered in the rear and just never did the front.

The other day I brought some wheels in the X home and after I loaded them and turned on the X5 I heard the compressor kick in for a bit. Any idea how I could find out if my X was lowered with DIS or otherwise? I am just trying to rule every scenerio out.

The rear is approximately 1 1/4" lower than the front.