Advantages of the Audi Advanced Key System Audi has a number of features for convenience that make your time at the wheel even more relaxing. One of these features is the advanced key system. It makes use of proximity sensors on the doors, trunk lids and key radio pulse generators. https://g2851229.total-blog.com/ten-audi-a3-replacement-key-myths-you-shouldn-t-share-on-twitter-55374929