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:
Steering wheel keypad
The keypad varies according to the vehicle's equipment
1 Turn the thumb wheel to go up/down
among menu selections. Press the thumb
wheel to make a selection or store a function
in the system' ...
Resetting
If the battery has been disconnected, the auto
open function must be reset so that it will work
properly.
1. Gently raise the front section of the button
to close the window and hold it for one ...
Accessory installation
• We strongly recommend that Volvo owners
install only genuine, Volvo-approved
accessories, and that accessory installations
be performed only by a trained and
qualified Volvo service technician.
...