For what it's worth, and I'm sure you've heard the suggestion before, but I swapped to coils after I was showing similar symptoms. I didn't want to just throw parts at it without knowing the cause. I used OE sach's struts/shocks with lesjofors springs and all OE mounts/hardware from FCP euro and I honestly can't tell a bit of difference in ride quality between this and my air suspension. No more worrying about one of the many suspension errors that can happen to disable the vehicle when I'm miles away from home.

__________________
__________________

2006 X5 4.8is