It is in section

Alle Reparaturhilfen/Repair Hints

and covers nice info about

Training reference books

Instrument Cluster / check control 2.25 MB, 23 pages
on-board computer OBC II/IV, 1.58 MB 17, pages

DME Info

Thanks Techboy for sharing with us.
It is under hyrumswebsite. Will add something more.

The info is for E34/E32 and some other pages for E38.

Hope that helps.