2005 Mercedes C-Class Owner's Manual - Page 191

Controls in detail Audio system Returning sound functions to factory settings Press O button to call up settings menu in the display. Vehicles with sound system*: The sound setting is reset depending on the sound source activated. Radio mode: STANDARD CD/AUX mode: SURROUND Telephone: SPEECH The radio switches back to the standard radio menu four seconds after the last soft key is pressed. Press RES soft key briefly; the respective sound function is reset to its center level. or Press and hold RES soft key until RESET appears in the display. The sound settings for bass and treble are returned to their center level and the volume is set to a predefined level. Fader Press P button repeatedly until FADER appears in the display. Adjusting volume distribution Call up fader and balance functions by pressing the P button. or Press RES soft key briefly. The fader is reset to its center level. The radio switches back to the standard radio menu eight seconds after the last soft key is pressed. Press V or W soft key. The volume is distributed accordingly between the front and rear of the vehicle. 189