Demanding driving

In demanding driving conditions, such as operating the vehicle in hot weather, towing a trailer, or driving for extended periods at higher altitudes than normal, it may be advisable to switch to higher octane fuel (91 or higher) or to change gasoline brands to fully utilize your engine's capacity, and for the smoothest possible operation.
NOTE
When switching to higher octane fuel or changing gasoline brands, it may be necessary to fill the tank more than once before a difference in engine operation is noticeable.
See also:
Interior lighting, front
Light switches, front roof lighting
1 Drivers side front reading light, on/off.
2 Passenger's side front reading light, on/off.
3 Overhead courtesy lighting.
The lighting in the front part of th ...
Coolant
Location of the coolant reservoir
Normally, the coolant does not need to be
changed. If the system must be drained, consult
a trained and qualified Volvo service technician.
See page 357 for i ...
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 a ...
