Leaving a client meeting today the iDrive was dead, and I had a drivetrain and adaptive headlight warning on the KOMBI. Luckily I knew exactly what was causing this. When I initially removed the Bimmer Retrofit adapter one of the CAN2 pins popped out of the quadlock, causing the exact same set of errors. I stopped at an electronics store on the way home to buy a couple of things, and as soon as I got home I checked my CAN2 wiring. The pins were secure, so I checked the splices on the CAN2 lines at the CAS. Bingo! Turns out the wire I used to connect the NBT to the CAN2 network was not thick enough, so the scotch locks did not cut clear through the sheathing, meaning very little splicing was taking place
Removed the wire and taped up the CAN2 lines at the CAS and re-spliced at the ZGW using 18AGW wires. Also took the opportunity to do some cable tidying behind the headunit. All in all took around 45 minutes, and a test drive after confirmed everything is working as it should.
The journey continues...