Can anyone tell me where can I get a 1992 W140 S500 workshop manual? I prefer it on CD so that I could print it as well as search quickly on subject.

Mercedes tech publications, sells a140 DVD 92 thru 99 for $175, covers bulletins, owners manuals, trouble shooting and wiring. A little hard to get used to but the only source for you and me. The hard copies were never available!

Yes, if you want something purchased from Mercedes Benz, the CD or their on-line service (expensive!) are the options. On the other hand, you can subscribe to the on-line manual system from Alldata.com for little money and get MB data there... and I think its organized better (but still a long way from perfect) The Alldata site will let you print anything/everything you want. Its worth a look before you drop $175. After looking over the CD, I like the Alldata system a lot better.. but, that may just be my preference.
Hope this helps.

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KenP

1996 S500 W140 Coupe