Method for connecting an operating state of a motor vehicle to a respective operating state of at least one vehicle-external device, wherein in a server device - the motor vehicle makes available event data via at least one event channel to describe the current operating state of the motor vehicle and/or receives triggering data via at least one triggering channel to set a required operating state of the motor vehicle and - the at least one vehicle-external device respectively makes available event data to describe the current operating state of the device via at least one event channel and/or receives triggering data via at least one triggering channel to set a required operating state of the device, - wherein as a result in total at least one channel pair (32, 33), comprising an event channel (22, 26) and a triggering channel (23, 27), which connects the motor vehicle to in each case one of the at least one device, is made available and wherein - depending on a user input, each channel pair is formed and at least one linking rule is defined by an input device, wherein each linking rule specifies respectively predetermined triggering data (25, 30) for a channel pair (32, 33) which is made available, which are output via the triggering channel (23, 27) of the channel pair (32, 33) if predetermined event data (24, 29) is received via the event channel (22, 26) of the channel pair (32, 33), and each linking rule is realised as if-then rule, in which the IF condition describes the event data and the THEN consequence describes the triggering data, and thus each linking rule represents a recipe for how the motor vehicle and the at least one vehicle-external device should react to each other, wherein the user sets this via the input device, and - the server device connects the operating state of the motor vehicle and the respective operating state of the at least one device according to the at least one defined linking rule, characterised in that the at least one device comprises a monitoring device for at least one bodily function of a user of the motor vehicle and it is defined as one of the at least one linking rule that data on physical condition are received via the event channel of the monitoring device and, depending on the received data on physical condition, a control command is output to the motor vehicle via the triggering channel of the motor vehicle, wherein a moment of awakening of the user is signalled by the data on physical condition and a starting time of a parking heater of the motor vehicle is output as control command by the linking rule defining the recipe that, after the awakening of the user, the parking heater is started after a predetermined period of time. - the motor vehicle makes available event data via at least one event channel to describe the current operating state of the motor vehicle and/or receives triggering data via at least one triggering channel to set a required operating state of the motor vehicle and - the at least one vehicle-external device respectively makes available event data to describe the current operating state of the device via at least one event channel and/or receives triggering data via at least one triggering channel to set a required operating state of the device, - wherein as a result in total at least one channel pair (32, 33), comprising an event channel (22, 26) and a triggering channel (23, 27), which connects the motor vehicle to in each case one of the at least one device, is made available and wherein - depending on a user input, each channel pair is formed and at least one linking rule is defined by an input device, wherein each linking rule specifies respectively predetermined triggering data (25, 30) for a channel pair (32, 33) which is made available, which are output via the triggering channel (23, 27) of the channel pair (32, 33) if predetermined event data (24, 29) is received via the event channel (22, 26) of the channel pair (32, 33), and each linking rule is realised as if-then rule, in which the IF condition describes the event data and the THEN consequence describes the triggering data, and thus each linking rule represents a recipe for how the motor vehicle and the at least one vehicle-external device should react to each other, wherein the user sets this via the input device, and - the server device connects the operating state of the motor vehicle and the respective operating state of the at least one device according to the at least one defined linking rule,