METHOD FOR TRANSMITTING A FUNCTION COMMAND BETWEEN A MOTOR VEHICLE AND A DEVICE OUTSIDE THE VEHICLE, AND INTERFACE APPARATUS AND SYSTEM

A function command is transmitted between a motor vehicle and a device outside the vehicle, in which the function command is transmitted via an interface apparatus which is outside the vehicle and provides a communication connection between the motor vehicle and the device. The interface apparatus provides an interface which is used to provide a plurality of valid function commands. The function command is compared with the plurality of valid function commands, and the function command is forwarded only if this function command conforms to the interface, and the function command is transmitted between the motor vehicle and the device only via the interface.