CITROEN C5 AIRCROSS Handbook page 222

In the event of a breakdown
F Switch on the hazard warning lamps on
both vehicles.
F Move off gently, drive slowly and for a short
distance.
220
General recommendations
Observe the legislation in force in the
country where you are driving.
Ensure that the weight of the towing
vehicle is higher than that of the towed
vehicle.
The driver must remain at the wheel of
the towed vehicle and must have a valid
driving licence.
When towing a vehicle with all four
wheels on the ground, always use an
approved towing arm; rope and straps are
prohibited.
The towing vehicle must move off gently.
When the vehicle is towed with its engine
off, there is no longer braking and steering
assistance.
In the following cases, you must always
call on a professional recovery service:
- vehicle broken down on a motorway or
main road,
- four-wheel drive vehicle,
- when it is not possible to put the
gearbox into neutral, unlock the
steering, or release the parking brake,
- when it is not possible to tow a vehicle
with an automatic gearbox, engine
running,
- towing with only two wheels on the
ground,
- where there is no approved towbar,
etc. available.