2006 Mercedes SLK-Class Owner's Manual - Page 207

Controls in detail Audio system Button and soft key operation In these instructions, the alphanumeric keypad (right side of radio panel) and the function buttons (left side of radio panel) are referred to as "buttons". The four keys below the display panel are referred to as "soft keys". Operation Switching the unit on/off Switching on Turn the SmartKey in the starter switch to position 1 or 2 ( page 36). If the audio system was on as you removed the SmartKey from the starter switch, the audio system will automatically come back on as you turn the SmartKey to position 1 or 2. or PressDbutton. i If the radio is switched on without the SmartKey in the starter switch, it will automatically switch off again after approximately 30 minutes. If your vehicle is equipped with a telephone, the display may prompt you to enter your PIN (GSM network) or code (TDMA or CDMA network). ! Do not press directly in the display face. Otherwise, the display will be damaged. 206