Installing over WiFi is something that doesn't require a user guide beyond 'connect your car to the WiFi' which anyone with a smart phone is used to. Entrustin

Installing over WiFi is something that doesn't require a user guide beyond 'connect your car to the WiFi' which anyone with a smart phone is used to. Entrusting non-technical people with installing via USB sticks is not something I'd want to do. As others pointed out Windows allows it for installing their OS, but installing Map updates should be orders of magnitude simpler. If the customers are going to go to the service centres to get the stick - better just to offer them a coffee there whilst the updates are downloaded over the service WiFi.