Advantages of the Audi Advanced Key System Audi offers a range of convenience features to make driving more enjoyable. One of these is the aforementioned key system. It works via proximity sensors that are located in the lids of the trunk and door handles, paired with key radio pulse generators. https://g28carkeysolutions17729.shoutmyblog.com/29380707/10-life-lessons-that-we-can-learn-from-audi-a3-replacement-key