Volvo XC90 TWIN ENGINE 2019 Owner's Manual page 523

Follow the regulations in force for the per-
•
mitted speeds and weights.
Maintain a low speed when driving with a
•
trailer up long, steep ascents.
The maximum indicated trailer weight only
•
applies to heights up to 1000 metres
above sea level (3280 ft). At higher eleva-
tions, the engine output and the vehicle's
climbing ability are reduced due to the
reduced air density, 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%.
IMPORTANT
When driving with a trailer in a car with air
suspension*, use the
Suspension Control
Dynamic setting in Individual drive
mode.
NOTE
Extreme weather conditions, driving with a
trailer or driving at high altitudes, in combi-
nation with poorer fuel quality than recom-
mended, are factors that considerably
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
connector. Use an adapter approved by Volvo.
Make sure the cable does not drag on the
ground.
IMPORTANT
When the engine is switched off, the con-
stant battery voltage to the trailer connec-
tor 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.
STARTING AND DRIVING
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.
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 and a
message is displayed.
The automatic gearbox adapts the gears
depending on 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.
* Option/accessory.
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