My 1995 E320 Wagon ( 150,000 miles ) Has developed what I can best describe as an intermitent "rumbling" in the right rear. It does not seem to be speed specific, but at times is much louder than others. It is especially noticable when the ambient temperature is 80+ degrees. I was thinking wheel bearing, but I am not so sure. As I stated, sometimes it is not audible at all, other times it is highly irritating. It does not squeal as a wheel bearing typcially does.

Any takers?

Thanks.

Jeff