Volvo V90 TWIN ENGINE Owner's Manual page 499

Follow the regulations in force for the permit-
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ted speeds and weights.
Maintain a low speed when driving with a
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trailer up long, steep ascents.
The maximum indicated trailer weight only
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applies to heights up to 1000 metres above
sea level (3280 ft). At higher elevations, the
engine output and the vehicle's climbing abil-
ity are reduced due to the reduced air den-
sity, and the maximum trailer load must
therefore be reduced. The weight of the car
and trailer must be decreased by 10% for
each additional 1000 m (3280 ft) (or part
thereof).
Avoid driving with a trailer on inclines of more
•
than 12%.
NOTE
Extreme weather conditions, driving with a
trailer or driving at high altitudes in combina-
tion with fuel quality are factors that consider-
ably increase the car's fuel consumption.
Trailer connector
An adapter is required if the car's towbar has a
13 pin connector and the trailer has a 7 pin con-
nector. Use an adapter approved by Volvo. Make
sure the cable does not drag on the ground.
IMPORTANT
When the engine is switched off, the constant
battery voltage to the trailer connector can be
switched off automatically so as not to drain
the starter battery.
Trailer weights
WARNING
Follow the stated recommendations for trailer
weights. Otherwise, the car and trailer may be
difficult to control in the event of sudden
movement and braking.
NOTE
The stated maximum permitted trailer weights
are those permitted by Volvo. National vehicle
regulations can further limit trailer weights
and speeds. Towbars can be certified for
higher towing weights than the car can
actually tow.
Level control*
The car's system for level control endeavours to
maintain a constant height regardless of load (up
to the maximum permissible weight). When the
car is stationary the rear of the car lowers slightly,
which is normal.
STARTING AND DRIVING
When driving in hilly terrain and hot
climates
Under certain circumstances, there may be a risk
of overheating when towing a trailer. If the engine
and drive system overheats, a warning symbol
comes on in the driver display together with a
message.
The automatic gearbox selects the optimum gear
related to load and engine speed.
Steep inclines
Do not lock the automatic gearbox in a higher
gear than the engine "can cope with" - it is not
always a good idea to drive at a high gear with
low engine speed.
Parking on a hill
1. Depress the brake pedal fully.
2. Activate the parking brake.
3. Select gear position P.
4. Release the brake pedal.
Block the wheels with chocks when parking a car
with hitched trailer on a hill.
Starting on a hill
1. Depress the brake pedal fully.
2. Select gear position D.
3. Releasing the parking brake.
4. Release the brake pedal and start driving off.
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* Option/accessory.