Digital Sound System Control Module -J525-, REMOVING AND INSTALLING, PREMIUM SOUND SYSTEM (9VS), 7-SEATER WITH 48V VEHICLE ELECTRICAL SYSTEM, FROM MY 2021: Installing

WARNING: This page is about a different car, the 2022 Audi SQ7, 2022 Audi S7, and 2022 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.