Well, when I got my 96, it had a few issues. Suspension, stereo, and motor mounts were key. Got the suspension replaced a couple months ago, and I finally got the mounts replaced yesterday and wow, you can hardly even tell the motor has been started. Also had the tranny mount changed just to be safe. Mechanic changed all 3 for $116, which I didnt think was bad at all.
FINALLY I can drive a benz and have the comfort it should!

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1996 E300 D
1992 300D
1990 Ford E-350 7.3 Diesel AKA "the Deep Fryer"