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.Google+
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.