Car multimedia system and method for activating a function of such a system

The present invention relates to a car multimedia system comprising an audio unit, a navigation unit for route guidance, a controller device for controlling said units, a display for displaying selection menus with hierarchically structured menu items and end-menu items, said end-menu items allowing to start a specific function, and a selection key unit comprising at least a push button switch, preferably a hard key, a two way switch, preferably a rotary knob, for selecting and a push button switch for activating menu items and end menu items. It further comprises a discriminating device (80) adapted to select an end-menu item (34) in response to an actuation of said push button switch (18), preferably said hard key, said end-menu item (34) being selected by said discriminating device (80) on the basis of a predetermined criterion.