engine mounts on 1998 Mercedes-Benz E430

i was told by my mechanic that all 3 engine mounts need replaced because of how bad the car vibrates in reverse how much should that repair be.

Asked by for the 1998 Mercedes-Benz E430
2 answers
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FRONT MOUNT, R&R E430 by the book

Both Sides 5.0
One Side 2.5