Embodiments of position detection devices for vehicles and methods of position detection are provided. One embodiment of a detection device comprises a wireless device inside a vehicle, a mobile communication device paired to the wireless device, such that the wireless device automatically activates when it senses the mobile communication device within an operable range of the wireless device, a position sensing system configured to generate an output indicative of the mobile communication device's presence within the vehicle and a controller responsive to the output and configured to deactivate the wireless device when the output indicates that the mobile communication device's presence is not within the vehicle but is still within the operable range.