Opel Antara Owner's Manual page 168

168 Driving and operation
Coupling socket load
The coupling socket load is the load
exerted by the caravan/trailer on the
coupling ball. It can be varied by changing
the weight distribution when loading the
caravan/trailer.
The maximum permissible coupling socket
load for the towing vehicle (80 kg) is stated
on the towing equipment identification
plate and should always be aimed for,
particularly in the case of heavy caravans/
trailers. The coupling socket load should
never be below 25 kg.
When measuring the coupling socket load,
make sure that the drawbar of the loaded
caravan/trailer is at the same height as it
will be when the caravan/trailer is coupled
with the towing vehicle loaded. This is
particularly important for caravans/trailers
with tandem axle.
Rear axle load during towing
When the caravan/trailer is coupled and
the towing vehicle fully loaded (including
all occupants), the permissible rear axle
load must not be exceeded.
National regulations regarding maximum
speeds for vehicles towing a caravan/
trailer must be observed.
Tyre pressure
Increase the tyre pressure on the towing
vehicle to the value specified for full load
(see page 224). Also check the pressure of
the caravan/trailer tyres.
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