Advantages of the Audi Advanced Key System Audi offers a variety of convenience features to make driving more enjoyable. One of these options is the aforementioned key system. It works via proximity sensors in the lids of the trunk and door handles, and is paired with key radio pulse generators. https://auto-locksmiths54265.thelateblog.com/30327512/a-peek-at-the-secrets-of-audi-a3-replacement-key