2009 Mercedes CLK-Class Owner's Manual - Page 149

Controls in detail Audio system switch off again after approximately 30 minutes. If your vehicle is equipped with a mobile phone, the display may prompt you to enter your PIN (GSM network) or code (TDMA or CDMA network). Switching off X Remove SmartKey from starter switch. or X Press button M. the volume of the audio system while the telephone is being used. X Press + or - soft key to increase or decrease tone level accordingly. 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. Adjusting sound functions The bass and treble functions are called up by pressing button O. Settings for bass and treble are stored separately for the AM and FM wavebands, weather band, CD mode and telephone mode. Bass X or X i Should excessively high temperatures occur while the audio system is being operated, the display will dim. If temperatures continue to rise, HIGH TEMP will appear in the display, after which the audio system will be switched off for a cooling-down period. Adjusting the volume X Press button O repeatedly until BASS appears in the display. Adjusting treble X Press button O repeatedly until TREBLE appears in the display. X Turn rotary control of button M. The volume will increase or decrease depending on the direction turned. 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. or X i If your vehicle equipment includes a Mercedes-Benz specified mobile phone, you can adjust its volume separately from Z 147