I just bought a 97 528E with 110,000 miles on it. A couple of things I noticed and wonder if they could be a problem. I bought it with a fresh set of tires ... 185's instead of the stock 195's. How might this affect the handling, if at all. The other glitch might be more serious. When I start in low gear (automatic) there is a slight "wobble", almost a "shimmy" or a "rumble" just briefly from the back end. Is this normal, or should I have something checked out?