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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 (
୴ page 37).
̈ 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.
Switching off
̈ Remove the SmartKey from the starter
switch.
or
̈ PressDbutton.
Adjusting the volume
̈ Turn rotary control ofEbutton.
The volume will increase or decrease
depending on the direction turned.
!
Do not press directly in the display face.
Otherwise, the display will be damaged.
i
If the radio is switched on without the
SmartKey in the starter switch, it will automati-
cally switch off again after approximately
30 minutes.
If your vehicle is equipped with a mobile
telephone*, the display may prompt you to enter
your PIN (GSM network) or code (TDMA or
CDMA network).
i
Should excessively high temperatures occur
while the audio system is being operated, the
display will dim. If temperatures continue to rise,
HIGH TEMP
will appear in the display, after which
the audio system will be switched off for a
cooling-down period.
i
If your vehicle equipment includes a
Mercedes-Benz specified mobile telephone*,
you can adjust its volume separately from the
volume of the audio system while the telephone
is being used.