What changes
Unit 09, object 0A6A: byte 0, bit 2 = 1. The doors unlock by themselves when the gear selector is moved to P.
Details
Setting of the newer MQB body control module (its long coding is empty, settings live in objects); on the older module the same option is object 0D08, byte 3, bit 3, so a3c refuses there before writing. Unit 09 on MQB Evo is SFD-protected — a token for unit 09 is needed, an SFD window of another unit does not apply. Roll back by writing the object backup from history.