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Advantages of the Audi Advanced Key System Audi offers a variety of features that make driving even more enjoyable. 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. When you're within 5 feet of the car it will open automatically. Keyless Entry The keyless entry feature can be a huge advantage for those who have to make rapid movements. It removes the need to scour pockets and bags to locate a car key