My 300E has made a strange noise for quite some time now, and it seems to be from around the front left suspension. It occurs only when going at parking lot speeds and when turning or braking at these speeds. My mechanic says it is nothing to worry about, just old bushings and that they are not bad, just noisy. Is this right? I know it is not the struts, because I just put new Bilstein HD's on it. Also, if an answer if found, how much would it possibly cost to fix? Thanks a million!