Here is a rebuild DIY.
http://www.benzworld.org/forums/r-c107-sl-slc-class/1374600-distributor-removal-repair.html#post2858839

And here is one for sale. You already have his number.

http://www.benzworld.org/forums/r-c107-sl-slc-class/1484317-73-4-5l-distributor-value.html