Motor mounts commonly fail, causing engine vibrations to be transferred to the body. Failed motor mounts should be replaced in order to prevent damage to the transmission mount.
Car Problem Reports
Mercedes-Benz ML320 Motor Mounts Fail and Cause Vibration in Body
Mercedes-Benz ML320 Problem
Average Mileage: 157,000 mi (100,000 mi - 210,000 mi)
Visitor, 2000 Mercedes-Benz ML320, 210,000 mi
Clunking from drivers side front.
left front engine mount failed. Dealer wants $840 to replace all.