This thread is very informative to me, I am also thinking about changing the motor mounts on my 92 400E by myself.

My car now vibrates at idle, and does worst at 1000 rpm when shift lever in any gear, also the car shakes a little bit at 120kmph highway speed, I had tires balanced twice without any improvement.

Are those the reasons that drove you to have motor mounts replaced? My 400E has 200k km already, when I bought it, I didn't get the complete service record, so I am not sure if they are due.

Thanks.

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99 BMW 540i 6-speed 110K Km
03 SAAB 9-5 wagon 80K Km
92 400E (Sold) 245K km
Still missing the days with the Benz, it kept me busy.