Mercedes-Benz C-CLASS WAGON C 240 - Manual (Page 208)

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Controls in detail
Audio system
Adjusting balance
̈ Press P button repeatedly until
BALANCE appears in the display.
̈ Press X or Y soft key.
The volume is distributed between the
left and right sides of the vehicle.
or
̈ Press RES soft key briefly.
The balance is reset to its center level.
The radio switches back to the
standard radio menu eight seconds
after the last button is pressed.
Returning volume distribution to
factory settings
̈ Press P button to call up settings
menu in the display.
̈ Press RES soft key briefly; the
respective volume distribution is reset
to its center (flat) level.
or
̈ Press and hold RES soft key until RESET
appears in the display.
The volume distribution settings for
fader and balance are set to their
center level.
The radio switches back to the
standard radio menu four seconds
after the last soft key is pressed.
Telephone* muting
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.