https://www.youtube.com/watch?v=mc-1rXGatHE
He has previously done an alternator on this car.
There is a very good web resource in this video for bookmarking. https://www.newtis.info/
It appears to be free wiring diagrams and repair info for BMWs. This is an amazing find for Adam.
Anyway the two repairs on this E46 have both been simple so that is something.