We were driving home tonight and noticed a weird vibration in our car -- only on the freeway at speed (50+ MPH) and fairly rhythmic. We pulled over to check the tires and the left front was low, but otherwise everything looked ok. I haven't seen anything in the forum to suggest any MB defect, but thought we would ask -- think it's perhaps a shock or alignment issue? The vibration either dissapeared or became less noticable (probably the latter) as we got off of the freeway and drove at city speeds.

 

have the wheel balanced first and see if they're fine.