At 2:39, my iPhone did start playing a song by The Beatles over Bluetooth to the Audi's sound system. However, RU-vid wouldn't allow me to publish the video with that Beatles song due to copyright restrictions. Consequently, I had to dub a copyright-free song over the Beatles song during the post-video edit. Nonetheless, the Bluetooth and wireless charging retrofit works great!
I just saw your comment! I posted a full parts list and write-up here: felixwong.com/2023/12/retrofitting-bluetooth-wireless-charging-to-an-audi-tt-mk1/ Good luck!
