2002 Mercedes SL-Class Owner's Manual - Page 106

Instruments and controls Audio system Operation Driving Instrument cluster display Practical hints Car care Technical data Index 102 Audio functions The AUD key is used to select the BASS, TREBLE and BALANCE functions. Settings for bass and treble are stored separately for the radio, cassette and CD modes. Tone level settings are identified by the vertical bars. The center (flat) setting is shown by one longer bar in the center of the display. Bass Press the AUD key repeatedly until "BASS" appears in the display. Operation Switching on and off Press the control knob . The radio is switched off when the ignition key is turned to position 0 or removed from the ignition. The radio is switched on again when the ignition key is turned to position 1 or 2. Note: The radio can also be switched on even if the ignition key is not inserted, but will switch itself off automatically after one hour to conserve vehicle battery power. Adjusting the volume Turn the control knob - turning the knob clockwise will increase the volume, counterclockwise will decrease the volume. Treble Press the AUD key repeatedly until "TREBLE" appears in the display. Press the "+" key to increase or the "-" key to decrease the level.