An operating system for operating a multifunction system that operates in a blind mode of operation and in a visual mode of operation. The operating system includes a touch-sensitive screen that displays a plurality of virtual function elements for controlling different functions. In the blind mode of operation, the virtual function elements are actuated without viewing the screen, and, in the visual mode of operation, the virtual function elements are activated while viewing the screen. A guide element and an additional operation element are connected to the screen. A control unit controls at least the guide element and the additional operating element provides, in the blind mode of operation, perceivable or audible feedback based on an actuation of the screen if a body part of the operator contacts the screen with one of the virtual function elements.
