Rail vehicle with - at least a first wagon (101.1), wherein - said first wagon (101.1) comprises a control device (103; 203) for controlling remote components of said rail vehicle and a first data transmission device of a first type connected to said control device (103; 203) for transmitting control data of said control device (103; 203) to said remote components, - at least a second data transmission device of a second type different from said first type is provided for transmitting control data of said control device (103; 203) to said remote components, - said control device (103; 203) has a detection device (103.4) for detecting at least one detection quantity representative of the data transmission device (104, 105) to be used and - said control device (103; 203) is adapted to switch, as a function of the current value of said detection quantity, from the use of said first data transmission device to a use of said second data transmission device, characterized in that - said control device (103; 203) comprises a first control unit (103.1) and a second control unit (103.2), wherein - said first control unit (103.1) is connected to said first data transmission device for feeding said control data, - said second control unit (103.2) is connected to said second data transmission device for feeding said control data, and - said control device (103; 203) is adapted to switch, as a function of said current value of said at least one detection quantity, from a use of said first control unit (103.1) to a use of said second control unit (103.2), wherein - said control device comprises a power supply device and a switching device (103.3) connectable to said detection device (103.4), - said power supply device is connectable to said first control unit (103.1) or said second control unit (103.2) via said switching device (103.3) and - said switching device (103.3) is adapted to connect said first control unit (103.1) or said second control unit (103.2) to said power supply device as a function of said current value of said at least one detection quantity. - at least a first wagon (101.1), wherein - said first wagon (101.1) comprises a control device (103; 203) for controlling remote components of said rail vehicle and a first data transmission device of a first type connected to said control device (103; 203) for transmitting control data of said control device (103; 203) to said remote components, - at least a second data transmission device of a second type different from said first type is provided for transmitting control data of said control device (103; 203) to said remote components, - said control device (103; 203) has a detection device (103.4) for detecting at least one detection quantity representative of the data transmission device (104, 105) to be used and - said control device (103; 203) is adapted to switch, as a function of the current value of said detection quantity, from the use of said first data transmission device to a use of said second data transmission device, - said control device (103; 203) comprises a first control unit (103.1) and a second control unit (103.2), wherein - said first control unit (103.1) is connected to said first data transmission device for feeding said control data, - said second control unit (103.2) is connected to said second data transmission device for feeding said control data, and - said control device (103; 203) is adapted to switch, as a function of said current value of said at least one detection quantity, from a use of said first control unit (103.1) to a use of said second control unit (103.2), wherein - said control device comprises a power supply device and a switching device (103.3) connectable to said detection device (103.4), - said power supply device is connectable to said first control unit (103.1) or said second control unit (103.2) via said switching device (103.3) and - said switching device (103.3) is adapted to connect said first control unit (103.1) or said second control unit (103.2) to said power supply device as a function of said current value of said at least one detection quantity.