2002 Mercedes C-Class Owner's Manual - Page 179

Instruments and controls Audio system Operation Driving Instrument cluster display Practical hints Car care Technical data Index 176 Operation Switching on and off Press the control knob . The system is switched off when the electronic key in the starter switch is turned to position 0 or removed. The radio is switched on again when the electronic key in the starter switch is turned to position 1 or 2. Note: The system can also be switched on separately with the electronic key removed, but will switch itself off automatically after half an hour to conserve vehicle battery power. Button and soft key operation In these instructions, the alpha-numeric keypad (right side of radio face) and the function buttons (left side of the radio face) are referred to as "buttons" and the four keys under the display are referred to as "soft keys" Note: Do not press directly on the radio display face.