Try and Figure this one out ???

[Casey's 2003 X5 4.4]

Casey's 2003 X5 4.4

Try and figure this one out...... After having the front brake pads replaced last week on my 03 X5 with full air strut suspension the mechanic finished the brake job and lowered the X5 from the rack back to the shop floor and the X5 suspension also lowered itself and would not go back to the normal ride height, the "Self Leveling Suspension Inactivation" message light came on, the BMW mechanic checked the fault codes nothing came back, He reset the ride height and everything was back to normal. So here is my question; yesterday I parked the car on my driveway while motor running, there is a slight 15% decline to my driveway, I had to go back and get the wallet I left inside when I got back in the car guess what???? The Self Leveling Suspension Deactive light came back on!!

What would cause this, by the way the X5 did not lower itself this time.