Software version is 3620
MMI software version is release-35.12-2126-SNAPSHOT-28.06.2021-13:58:42
Navigation database is V03959822FK_P1140_EU_2024.03
Since having it updated I now have Android Auto wirelessly which I didn't before (had to connect a cable)
Hope this helps !
Problem resolved. I replace the tailgate lock. My conclusion is that the lock did not "signal" door open and this causes the towbar to not release etc....