Spent three hours this evening changing both motor mounts and the transmission mount. Amazing difference in smoothness. If I had known it was going to be so quick, I would have done it a long time ago. The shaking at idle has been dramatically reduced, and gone is the clunk when shifting from Drive to Reverse. Just an FYI for anyone wondering if they should, or how difficult it is.

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NOW:
1992 W140 300SD 217K total. 70K on 1st 3.5 "Rod Bender" 147K on 2nd - so far no oil consumption
THEN:
1985 300D 395K and running flawlessly when sold - loved this car
1977 Euro spec 300d with manual trans - total dog.

Thanks for the commentary, I have been toying with the idea of changing all these and now I think I'll go ahead and do it.

One question though, was your idle vibration always the same or did it progressively get worse as the engine warmed up?

thanks
steve a

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Steve A
92 W140 OM603
97 VW Jetta TDI
90 Passat variant TDI 6 speed MT
94 Chevy K1500 6.5TD
05 E320 CDI
+ others