It is in My W123 CD #2.
What I found is there if you use the normal method to look up stuff there not everthing shows up in the Menues.

If you look at the CD as if you were looking a file folder go to Program and open that file. When you do that you will see the Chassis File Folder and a list of PDFs. Find the Number given by stretch and that should be the one.

__________________
84 300D, 82 Volvo 244Gl Diesel