Advantages of the Audi Advanced Key System Audi provides a variety of convenience features that can make driving even more enjoyable. One of these features is the aforementioned key system. It operates through proximity sensors located in trunk lids and door handles, which are paired with key radio pulse generators. https://g28carkeysolutions74480.anchor-blog.com/10450454/10-places-that-you-can-find-audi-a3-replacement-key