On new Mercedes back when I bought my 2.6 in '88 there was a bingo card in the owner's package that got you a free illustrated parts breakdown booklet if you sent it in. It's quite handy and might still be available from dealers.

This is probably the booklet that is referred to in the previous post as being available on ebay. The one I have covers the compete W201 model line for what appears to be all markets and is written in several languages.

Duke