Motor vehicle, comprising - a screen for optically signalling variable information, - a lighting unit designed as interior lighting and comprising a plurality of light sources, each with an integrated slave control unit, and a master control unit, and - a control unit for controlling the lighting unit and the screen, - wherein the master control unit and the slave control units are connected via an arrangement of data lines for the exchange of data in accordance with a predefined protocol, and - wherein each slave control unit contains a programmable constant-current driver, a signal shaper and one register per colour channel for loading a number of brightness values, - wherein the control unit is designed = for the control of the screen, to output a video signal comprising a sequence of video images each having an overscan area, wherein information for control of the lighting unit is encoded in the overscan area; = to feed the sequence of video images to the lighting unit and to the screen in parallel; - wherein the screen is designed to evaluate the image information for optical signalling that is provided in the sequence of video images and to ignore the information contained in the overscan area; and - wherein the integrated master control unit is designed to read out the information relevant to the control of the lighting unit from the overscan area and to process said information and to control the lighting unit with a video signal analogously to the control of the screen. - a screen for optically signalling variable information, - a lighting unit designed as interior lighting and comprising a plurality of light sources, each with an integrated slave control unit, and a master control unit, and - a control unit for controlling the lighting unit and the screen, - wherein the master control unit and the slave control units are connected via an arrangement of data lines for the exchange of data in accordance with a predefined protocol, and - wherein each slave control unit contains a programmable constant-current driver, a signal shaper and one register per colour channel for loading a number of brightness values, - wherein the control unit is designed = for the control of the screen, to output a video signal comprising a sequence of video images each having an overscan area, wherein information for control of the lighting unit is encoded in the overscan area; = to feed the sequence of video images to the lighting unit and to the screen in parallel; = for the control of the screen, to output a video signal comprising a sequence of video images each having an overscan area, wherein information for control of the lighting unit is encoded in the overscan area; = to feed the sequence of video images to the lighting unit and to the screen in parallel; - wherein the screen is designed to evaluate the image information for optical signalling that is provided in the sequence of video images and to ignore the information contained in the overscan area; and - wherein the integrated master control unit is designed to read out the information relevant to the control of the lighting unit from the overscan area and to process said information and to control the lighting unit with a video signal analogously to the control of the screen.