PEUGEOT RCZ Handbook page 195

Cooling
Towing a trailer on a slope increases the temperature of the coolant.
As the fan is electrically controlled, its cooling capacity is not dependent
on the engine speed.
 To lower the engine speed, reduce your speed.
The maximum towing load on a long slope depends on the gradient and
the ambient temperature.
In all cases, pay attention to the coolant temperature.
 If the warning lamp and the STOP warning lamp come
on, stop the vehicle and switch off the engine as soon as
possible.
Braking
Towing a trailer increases the braking distance.
Tyres
 Check the tyre pressures of the towing vehicle and of the trailer,
observing the recommended pressures.
Lighting
 Check the electrical signalling on the trailer.
The rear parking sensors will be deactivated automatically if a
genuine PEUGEOT towbar is used.
When not towing a trailer, remove the quickly-detachable tow ball
before driving, so as to avoid masking the central rear lamp.