Volvo 2001 S80 Operation And Care Manual page 90

"detent" indicates "equalized" balance. Press the button back in when you have made the adjustment.
A - Setting station
Press the left side of the button to select lower frequencies and the right side for higher frequencies. Set frequencies are
displayed.
B - Station seek up/down
Press the left side (lower frequency) or right side (higher frequency) of the button to start the seek function. The radio
seeks the next audible station and tunes it in. Repeat the procedure to continue the seek function.
Audio system controls on the steering wheel
Station seek up/down
If you have a key pad in the steering wheel press the right or left arrow to switch between preset stations.
Scan function
Press the SCAN button (HU-611) or the SOURCE button (HU-801) to start the station scan function. When a station
is found, scanning stops for several seconds, after which scanning will continue.
Press the SCAN or SOURCE button when a station has been found if you would like to listen to that station and to
discontinue the scan function.
pg.134 Audio systems HU-611/HU-801 - radio