Here's a quick and dirty link of the different chassis types (up to 1980):

http://www.mercedes-veterans.com/cars/types.htm

This site is more detailed, but is a lot slower to load and is in German:

http://www.ollihart.de/mercedes/pkw/start2.html

__________________
Mike Heath
1988 560SL Black/Palomino
1988 300SEL Black Pearl/Burgandy
1984 500SEC Anthracite Grey/Palomino