John H

2007 E55

For years the car has always had a light vibration under light load on the freeway. It is road speed related, not rpm related as it vibrates at the same mph whether I’m in 5th, 6th, or 7th gear.

Also, it’s more audible than physical. That is to say it’s quite loud when it happens but only mildly noticeable by the seat of the pants.

I don’t feel the vibration in the steering wheel.

This is has been going on for some time and the wheels have been balanced multiple time. Motor and tranny mounts changed in the last month.

Would like Ike to get some ideas before changing out parts.

Thanks.

konigstiger

Have wheels/tires been "road force" balanced. If so, next place to start looking is flex disc/shaft.

John H

Konig - thank you for the reply and the attachments!