A head unit of a vehicle is capable of defining a policy about conversion of interworking means between the vehicle and a mobile device and controlling conversion of the interworking means according to the defined policy to thereby minimize a delay generated upon conversion and to provide a service without interruption. A vehicle includes the head unit and a method of controlling the vehicle includes the head unit. The head unit of a vehicle interworking with a mobile device comprises: a communication interface including a wired communication module and a wireless communication module; a display configured to display an image corresponding to a video signal transmitted from the mobile device through the communication interface; and a controller configured to determine, if a new interworking request is received when the head unit interworks with the mobile device, whether the interworking with the mobile terminal is wired interworking through the wired communication module or wireless interworking through the wireless communication module. The controller is configured to determine whether to allow or disallow the new interworking request according to the determination.