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Advantages of the Audi Advanced Key System Audi provides a variety of features that make driving more enjoyable. of these features is the advanced key system. It works by using proximity sensors in trunk lids and door handles, paired with key radio pulse generators. When you're within about five feet of the car it will unlock automatically. Keyless Entry The keyless entry function can be a big benefit for those who have to perform quick movements. It eliminates the need to search through pockets and bags to find