You can check to see if a motor mount is broken by having someone sit in the car, and with your foot on the brake, put the car in drive and give the engine a little gas. Have someone look at the engine move. Do the same thing with the car in reverse.

If the front or back of the engine sort of jumps up, you'll be able to see if the front or rear motor mount is broken.

Do you get a vibration at idle in the cabin?

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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".