A system for controlling functions in a motor vehicle, which system comprises: a central node, and a set of actuators (A1,..., An) configured so as to be controlled from the central node for the purpose of performing at least one function in the vehicle, which actuators (A1,..., An) are communicatively connected with the central node via a bus connection, wherein the central node is configured so as to transmit, on the bus connection, signals containing: at least one identity datum (ID1,..., IDn) identifying at least one of said actuators (A1,..., An), and control data indicating a setting (1X,..., nX) of said at least one identified actuator (A1,..., An), wherein each and every one of said actuators (A1,..., An) is configured so as to receive, via the bus connector, the signals and, on the basis thereof, to adjust a respective setting so that at least one ordered function (FCN1,..., FCNm) is performed, characterized in that each and every one of said actuators (A1,..., An) is configured so as to perform a set function and each and every one of said actuators (A1,..., An) is associated with a respective predefined identity datum (ID1,..., IDn) that uniquely identifies the actuator within the vehicle, and wherein the bus connection is expandable, so that a second actuator (An) can be connected to a first actuator (A(n-1)) connected to the central node via the bus connection, so that, after the connection, the second actuator (An) shares the connection to the bus connection with the first actuator (A(n-1)) and the second actuator (An) can be controlled by means of said signals that are communicated via said first actuator (A(n-1)). a central node, and a set of actuators (A1,..., An) configured so as to be controlled from the central node for the purpose of performing at least one function in the vehicle, which actuators (A1,..., An) are communicatively connected with the central node via a bus connection, wherein the central node is configured so as to transmit, on the bus connection, signals containing: at least one identity datum (ID1,..., IDn) identifying at least one of said actuators (A1,..., An), and control data indicating a setting (1X,..., nX) of said at least one identified actuator (A1,..., An), wherein each and every one of said actuators (A1,..., An) is configured so as to receive, via the bus connector, the signals and, on the basis thereof, to adjust a respective setting so that at least one ordered function (FCN1,..., FCNm) is performed, characterized in that each and every one of said actuators (A1,..., An) is configured so as to perform a set function and each and every one of said actuators (A1,..., An) is associated with a respective predefined identity datum (ID1,..., IDn) that uniquely identifies the actuator within the vehicle, and wherein the bus connection is expandable, so that a second actuator (An) can be connected to a first actuator (A(n-1)) connected to the central node via the bus connection, so that, after the connection, the second actuator (An) shares the connection to the bus connection with the first actuator (A(n-1)) and the second actuator (An) can be controlled by means of said signals that are communicated via said first actuator (A(n-1)).