Instrument panel lighting

The instrument panel lighting illuminates when
the ignition key is in position II and the light
switch (1) is in either position 
Move the thumb wheel (4) up to increase brightness or down to decrease brightness.
See also:
Cargo area cover
...
Blower control
Turn the control clockwise
to increase or counterclockwise to decrease the blower speed. If AUTO is selected,
blower speed will be regulated automatically and this will override manual adjustment. ...
Safety Features
The S80 excels at safety. Before the little bubble above your head fills with
the word "Duh," let me add that this Volvo has some breakthrough safety gizmos
we hadn't seen until very rec ...
