From posts on the coding board its either 6fl
with the aux coming from the mulf combox or
not . No choice .
Be careful of the spelling of activ
I think its spelled with a K aktiv
compare it to other aktiv spellings.
You should only have to remove nicht anyway.
I believe you have to repin the connector or buy one
of the adapter cables for the TCU.
Bluetooth is contained in the Mulf module to for phone.
https://www.e90post.com/forums/showthread.php?t=1429377
see entry 8 in the above.