Welcome to the forum!

Here is one that was not finished here:

http://www.peachparts.com/shopforum/tech-help/321329-722-5-tear-down-side-start.html

Here is one with some great links(look at the links one by one). Lots of data:

http://www.benzworld.org/forums/w140-s-class/1893185-1996-s280-australia-transmission-no-reverse.html

Hope it helps,

Martin