Hello. I have two sets of wheel. One original e53 with new tire for summer and the second wheel set original for e70 with center ring used for about 3000 miles for the winter. It shakes with both sets. I changed ball joint and bushing on trust arm on both sides in front and at back side i changed control arm, thrust arm on both side and ball joint on right side. The stering rack is ok. Now i am clueless. And also my car mechanic...