Hi all, I'm working on refurbishing a 2005 M5. I've noticed that at slow speeds, the front drivers wheel occasionally rubs. It has 20" wheels and H&R springs. What I have noticed is that when I compare the drive height on the front, the passenger side is 10mm higher than the drivers side. Also, after jacking it up and then lowering it again the height doesnt change on the passengers side but it slowly sinks on the drivers side. Is this purely a shock problem? Wanted to check before I go out and buy a new one! Thanks.