Seems you have a lot of wiring issues. Was this car ever in a flood situation?

I would pull all the connections off on the ebox and clean them with contact spray and reassemble.

I think there's a tie to can buss on the oil sensor known to short and cause problems. (not sure if it's that sensor. I had a problem in that neck of the woods once but it ended being something else so I didn't need to swap the oil sensor).

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)