Have you looked into which years this schematic covers?
Around 2005 and 2006 they had a distributed system like this
in the Logic 7 cars and then it changed to the same one the
across all series .
You should go to the e60 stereo forum.(If there is one)
Or do searches under E60 stereo
https://5series.net/forums/e60-e61-p...nstall-124141/