There are quite a few people who bought older Audi still don’t know how to stream the music from the Phones to the MMI 2G system. To me, the best is to add CarPlay to the MMI 2G system. There are a few companies that make CarPlay for MMI 2G that works with the controls very effortlessly for about $350-$400. I did the hard way but still works very well, .
1. The best and easy way to stream through Auxiliary External Audio Input is to buy the MMI 2G cable with USB BT dongle and USB power. If you buy from Amazon or Aliexpress, read the reviews to make sure they’re good.
2. The second way is to use separate BT dongle, AMI 2G Cable with Auxiliary input, and a Ground Loop Noise in case the noise in the sound system.
