Volvo XC40 Owner's Manual page 402

STARTING AND DRIVING
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WARNING
Damage may occur on the towbar if it is
not used correctly or if incorrect or faulty
accessories are used, such as:
Overloading of accessory.
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Use of incorrect or faulty accessory.
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Accessory used for an incorrect pur-
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pose.
Use of weight-distributing towing sys-
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tem.
Incorrectly positioned ball mount; see
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geometric limits for the towbar.
Stowing the ball holder
WARNING
When not in use, the detachable ball holder
should always be properly stowed in the
designated location under the floor of the
cargo compartment.
Driving with a trailer
When towing a trailer, the original ball holder
or equivalent should be used.
400
The ball mount must fall within the geometric
limits for the towbar, for both distance
height . Geometric limits are described on a
type plate located on the towbar.
Related information
Driving with a trailer (p. 400)
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Towing capacity and tongue weight
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(p. 598)
Driving with a trailer
There are a number of things to consider
when towing a trailer, such as the towbar, the
trailer and how the load is distributed in the
trailer.
Load-carrying capacity is determined by the
vehicle's curb weight. The total weight of all
passengers and any installed accessories, e.g.
towbar, reduces the vehicle's load-carrying
capacity by the corresponding amount.
Towbars used on the vehicle must be
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approved for the applicable use.
Distribute the load on the trailer so that
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and
the weight on the towbar complies with
the specified maximum towball weight.
The tongue weight is calculated as part of
the vehicle's payload.
Increase the tire pressure to the recom-
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mended pressure for a full load.
The engine is subjected to more load than
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usual when towing a trailer.
Towing a trailer affects the vehicle's han-
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dling, durability and driving economy.
Do not drive with a heavy trailer when the
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vehicle is very new. Wait until the mileage
has reached at least 1000 km (620 miles).
On long and steep downgrades, the vehi-
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cle's brakes are subjected to much more
load than usual. When manually shifting,
downshift and adapt speed accordingly.