2006 Mercedes CLK-Class Owner's Manual - Page 214

Controls in detail Audio system Adjusting the volume Turn rotary control of N button. The volume will increase or decrease depending on the direction turned. Bass Press O button repeatedly until BASS appears in the display. Adjusting treble Press O button repeatedly until TREBLE appears in the display. i If your vehicle equipment includes a Mercedes-Benz specified mobile telephone*, you can adjust its volume separately from the volume of the audio system while the telephone is being used. 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. or Press RES soft key briefly to reset bass tones to their center level. The radio switches back to the standard radio menu eight seconds after the last soft key is pressed. Press + or - soft key to increase or decrease tone level accordingly. or Press + or - soft key to increase or decrease tone level accordingly. Press RES soft key briefly to reset treble tones to their center level. The radio switches back to the standard radio menu eight seconds after the last soft key is pressed. 213