If you have the stock euro M5 rear springs (self leveling was an option on Euro M5) as sold by Maximillian (and maybe others), take a good look at how they sit on the perches. First, make sure you got the proper perches. Then, make sure the springs are right side up. If not, they may bounce off the lower perches constantly, and sit at an angle. Noticed mine were this way, emailed Paul at Maxi, and he told me they are assymetrical and if upside down don't sit right. Apparently PO of my car had someone put them on upside down. Car sure rides better now!