Volkswagen AG is looking to change the way consumers buy new-car options by using over-the-air updates to offer some features on a trial basis. Calling the process "functional demand," Volkswagen believes it can revolutionize the options-buying process, giving consumers more time to try out and experiment with infotainment, comfort features, powertrain functions and other options. These features could be added and deleted, with car buyers purchasing them on a subscription or trial basis.