Did the swap this weekend. I'd say it's a two-day job, depending on previous experience with retrofitting. LHD vehicle, early 2009 facelift with CECM/CC and bixenon.
Did not disassemble the car as much as shown earlier in this thread. I removed luggage compartment side panels and floor, rear seat, interior trim along left side of vehicle, A-pillar trim and driver side footwell trim. Extension wiring from centr. convenience unit along left side of the car made up from 0,35mm2 and 0,5mm2 multicolor wires. In my case 13 wires. New wires to power convenience functions in BCM and new light switch directly from fuse box C as per factory wiring diagram.
Most wires in CECM plugs can be directly transferred to BCM plugs. Some wires have to be extended, and some wires need new pins. I bought the BCM with relays and plugs incl. wire ends. This is a great advantage as you can keep track of which pins you have moved and if wire gauge/color matches.
Remote control learning procedure in adaptation 001, all OK. Everything working at 1st start up, except for a terminal 50 open circuit fault code (suspect it is due to coding for start/stop system in donor car?).
I bought the 8P0 907 063 N unit with sw 0667. This version has support for LED number plate light per coding, so I finally could install my OEM LED number plate lights lol
Next up: Taping all wires and HBA mirror install.