CITROEN C4 Cactus Handbook & Instructions page 106

Driving
Entering a parallel parking space
F When you have identified a free space,
reduce the speed of the vehicle to a
maximum of 12 mph (20 km/h).
F Position your vehicle before this space.
104
To activate the Park Assist system:
F Press this control to activate the system.
The indicator lamp in the control remains off.
oR
F Select the "Driving assistance"
menu in the touch screen tablet.
F In the secondary page, press on
"Park Assist".
A message is displayed in the screen.
F Select the enter parking space manoeuvre.
The indicator lamp in the control comes on.
F operate the direction indicator on the
parking side.
F Move forwards alongside the parking
space at a speed below 12 mph (20 km/h)
to measure it, keeping at a distance of
between 0.5 and 1.5 metres from the row of
parked vehicles.
Once measurement is complete, if the space is
large enough a message indicates that parking
is possible.