14 IntroductionAudio playersPress the CD / AUX / CD/AUX buttonto open the CD, USB, iPod or AUXmenus (if available) or to swapbetween these menus.Press the multifunction knob to opena submenu with options for trackselection.Detailed description of:■ CD player functions 3 44■ AUX input functions 3 48■ USB port functions 3 50Navigation(only Navi 600 / Navi 900)Press the NAVI button and then themultifunction knob to open theNavigation menu.Detailed description of the navigationsystem functions 3 58.Phone(if Phone portal available)Press the PHONE button to open thetelephone menu.Press the multifunction knob to opena submenu with options for the inputor selection of numbers.Detailed description of the mobilephone portal functions 3 117.Basic operationMultifunction knobThe multifunction knob is the centralcontrol element for the menus.Turn the multifunction knob:■ to mark a menu option■ CD 300: to display a menu option■ to set a numeric valuePress the multifunction knob(Navi 600 / Navi 900: press the outerring):■ to select or activate the markedoption■ CD 300: to select or activate theoption displayed■ to confirm a set value■ to switch a system function on/offBACK buttonPress the BACK button briefly to:■ exit a menu■ return from a submenu to the nexthigher menu level■ delete the last character in acharacter sequencePress and hold the BACK button for afew seconds to delete the entire entry.Examples of menu operationNavi 600 / Navi 900Selecting an option