User feedback today: added a spare smart key to Audi A6 2016 BCM2 with xhorse vvdi key tool plus and new Audi BCM2 adapter V2 kit successfully.
BCM: BCM2 encrypted.
Part number: 4H0907064GQ
Software version 0572
Hardware version H37
Processor MCU: D70F3634
Menu path:
IMMO-Audi- select by model- A6L- 2011-2019 (IMMO5 BCM2)
Procedure:
Read immo data with adapter.
Make dealer key.
Learn key.
Photo attached: