A coupling control module according to the invention, comprises the coupling control module designed to transmit at least one configuration bus message to the at least one motor vehicle bus module via the bus interface, wherein the configuration bus message contains a configuration identifier to be entered in configuration data of the motor vehicle bus module, wherein the configuration identifier is provided so that when the motor vehicle continues to be operated, at least one motor vehicle bus module can execute at least one function according to the existence of the trailer coupling and/or according to bus messages received from the coupling control module on the basis of received configuration identifier.