2007 Mercedes C-Class Owner's Manual - Page 192

Controls in detail Audio system Adjusting sound functions The bass and treble functions are called up by pressing the O button. Settings for bass and treble are stored separately for the AM and FM wavebands, weather band, CD mode and telephone mode. Bass Press O button repeatedly until BASS appears in the display. The radio switches back to the standard radio menu 8 seconds after the last soft key is pressed. Adjusting treble Press O button repeatedly until TREBLE appears in the display. Sound system* You can either program the sound settings manually ( page 191) or choose settings via preset sound characteristics. You can select from among the following settings: STANDARD: conventional stereo sound. SURROUND: the sound is set for better three-dimensional acoustic characteristics. SPEECH: the sound is optimized for the spoken word. Press + or - soft key to increase or decrease tone level accordingly. or Press + or - soft key to increase or decrease tone level accordingly. or Press RES soft key briefly to reset bass tones to their center level. Press RES soft key briefly to reset treble tones to their center level. The radio switches back to the standard radio menu 8 seconds after the last soft key is pressed. Press O button repeatedly until STANDARD, SURROUND, or SPEECH appears in the display. Press X or Y soft key repeatedly until the desired sound setting has been reached. The sound is set accordingly. or 191