I think its kinda silly letting this car go for just a vibration at 55.

Maybe it is a bad tire.

Could be a flex disc, drive shaft, or center support bearing.

Could be motor mounts, or rear differential mounts.

This is a 6 year old car with 179,000 miles. It is going to need something.

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".