Volvo S80 Owner's Manual page 95

All-wheel drive is always engaged.
All-wheel drive means that the vehicle is driven
by all four wheels at the same time.
The power is distributed automatically between
the front and rear wheels.
An electronically-controlled clutch system
distributes the power to the pair of wheels
which have the best grip in the road conditions.
This is to get the best possible grip and to avoid
wheelspin.
Under normal driving conditions, the majority
of power is transmitted to the front wheels.
The greater traction improves driving safety in
rain, snow and icy conditions.
94
If the car is equipped with speed-dependent
power steering it is more easily steered at low
speeds to facilitate parking or the like.
When speed is increased, steering force is
adapted to provide the driver increased road
sensitivity.
Do not drive with an open boot
lid!
If you drive with the boot lid open, some of the
exhaust gases and poisonous carbon monoxide
can be sucked into the car through the cargo
compartment. If you must drive a short distance
with the boot lid open, do as follows:
· Close all windows.
· Distribute the air between the windscreen
and floor and while running the fan at high
speed.