Volvo S80 Owner's Manual page 79

03 Your driving environment
Ignition modes
Functions with timer
The audio system can be operated without a
key for 15 minutes at a time by pressing the
POWER button. The power windows work
for several minutes after the key has been
removed, although not after the door has
been opened.
03
NOTE
Use the POWER button for the audio sys-
tem when the engine is not running to avoid
discharging the battery.
78