Volvo S80 Owner's Manual page 172

Press button to switch the radio on or off.
Turn the knob clockwise to increase volume.
Volume control is electronic and does not have
an end stop. If you have a keypad in the
steering wheel, increase or decrease volume
with the + or - buttons.
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If a cassette or a CD is playing when the radio
receives traffic information, news, or a selected
programme type, the function is interrupted,
and the message will be heard
at the pre-set volume for traffic information,
news or programme type. Volume is adjusted
with the volume control.
The unit will thereafter return to the previously
set volume and continue playing the cassette or
the CD.
Set the bass by pressing out the button and
turning to right or left. In the centre position the
volume is "normalised". Press the button back
to original position after setting.
Set the treble by pressing out the button, pull it
further out and turn it left or right. In the centre
position the volume is "normalised". Press the
button back to original position after setting.
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