I'm sure this has been covered before, but here is the issue.

1994 E320. 91k

Slight steering wheel vibration ( also noticable in passenger seat back movement when empty ).

I was convinced it was bad tires; replaced all existing Michelins with new Michelins last week. Still there. It seems that the issue was exaserbated by the older tires, as it does not seem as prevalent as before. No signs of bent rim on new tire install.

Steering shock is new, idler arm bushing is new. It seems worse when the ambient temperature climbs above 80...

It is really beginning to irritate.

Any ideas?

Thanks.