CITROËN C4 Handbook page 172

Driving
Switching off the engine
F Stop the vehicle.
F With the engine running at idle, turn the key
to position 1.
F Remove the key from the ignition switch.
F To lock the steering column, turn the
steering until it locks.
To facilitate unlocking of the steering
column, it is recommended that the
wheels be returned to the straight ahead
position before switching off the engine.
F Check that the parking brake is correctly
applied, particularly on sloping ground.
Never switch off the ignition before the
vehicle is at a complete stop. With the
engine off, the braking and steering
assistance systems are also cut off: risk
of loss of control of the vehicle.
When you leave the vehicle, keep the
key with you and lock the vehicle.
170
Energy economy mode
After switching off the engine (position 1-Stop),
for a maximum of 30 minutes you can still use
functions such as the audio and telematic
system, the wipers, dipped beam headlamps,
courtesy lamps, ...
For more information on the
energy economy mode, refer to the
corresponding section.
Key left in the "Ignition on" position
If the key has been left in the ignition
switch at position 2 (Ignition on),
the ignition will be switched off
automatically after one hour.
To switch the ignition back on, turn the
key to position 1 (Stop), then back to
position 2 (Ignition on).