For Audi vehicles with AMI (located in the Glove box).
Audi Music Interface (AMI) Needs to have an AUX adapter plugged in to allow AUX to be selected within the MMI system.
All CarPlay integration units utilise AUX for sound output. Though this connection is done through a plug and play harness (during installation), this AMI adapter is needed purely for to be able to select AUX on the MMI.
If you have any questions please visit the contact page and touch base with the team.