Years ago (about 12 I think)someone wrote a technical manual for that controller and it was printed in a "Star" magazine article. A customer brought it to me and we have used it to diagnose those controllers ever since in our radio/electronics room. Last time I saw the document it had a big section eaten out of the text (mice, I think).
I don't know if they have archives, but if any of you super sleuths can locate it, I would like another copy.
In the mean time I will see if I can locate whats left. Unfortunately my brother has the info in his hard head instead of his hard drive so I don't think its recoverable at this end.
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician