Mercedes-Benz 2006 C-Class - Manual (Page 203)

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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.
̈ 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
̈ Press M button.
!
Do not press directly in the display
face. Otherwise, the display will be
damaged.
i
If the radio is switched on without the
key in the starter switch, it will
automatically switch off again after
approx. 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).