CITROEN C4 Handbook page 99

while pressing the "START/STOP" button to
assist unlocking of the steering column.
Petrol engines
With Petrol engines, after a cold start,
pre-heating the catalytic converter can cause
noticeable engine vibrations, for anything up
to 2 minutes (accelerated idle speed).
If the engine stalls, release the clutch
pedal and fully depress it again, the
engine will restart automatically.
Switching off
► Immobilise the vehicle using the parking
brake.
► With a manual gearbox, ideally put the gear
lever into neutral.
► With an automatic gearbox, ideally select
mode P or N.
► Press the "START/STOP" button.
In some circumstances, it is necessary to turn
the steering wheel to lock the steering column.
On certain versions with an automatic gearbox
(EAT8), the steering column does not lock, but
the gearbox locks in mode P.
If the vehicle is not immobilised, the
engine will not stop.
With the engine off, the braking and
steering assistance systems are also cut
off - risk of loss of control of the vehicle!
Never leave your vehicle with the
electronic key still inside.
Switching on the ignition
without starting the engine
With the electronic key in the passenger
compartment, pressing the "START/STOP"
button, without depressing any of the pedals,
allows the ignition to be switched on without
starting the engine.
► Press this button again to switch off the
ignition and allow the vehicle to be locked.
Key not detected
Back-up starting
A back-up reader is fitted to the steering column,
to enable the engine to be started if the system
fails to detect the key in the recognition zone, or
if the battery in the electronic key is flat.
► Place and hold the remote control against the
reader.
► With a manual gearbox, place the gear lever
in neutral, then fully depress the clutch pedal.
► With an automatic gearbox or a drive
selector, select mode P, then depress the brake
pedal.
► Press the "START/STOP" button.
The engine starts.
Back-up switch-off
If the electronic key is not detected or is no
longer in the recognition zone, a message
Driving
6
97