I would say that the MB CDs are absolutely the best for cars til about 1990. As the cars got more electronic the Diagnostic Manual became the most valuable info. Alldata does have the Diagnostic manuals and the ETMs (electronic troubleshooting manuals). They are very poor on repair procedures.
I don't know what you get with a consumer version of Alldata but what I get is semi usefull for late model cars. As I say it does have the DM and ETM and it does apply the right system to the year in question. (something a bit tricky if using the DM).
It will be interesting to see what MB will put on a CD for the 140 chassis. There were no print manuals that I know of to condense into a CD as there were with the current chassis being done on CD.
[Edited by stevebfl on 04-26-2001 at 09:11 AM]
Bosch Master, ASE Master, L1
33 years MB technician