CITROËN C4 Handbook page 250

In the event of a breakdown
F Place the foot of the jack 2 on the ground
and ensure that it is directly below the
front A or rear B jacking point provided on
the underbody, whichever is closest to the
wheel to be changed.
Ensure that the jack is stable. If the ground is slippery or loose, the jack may slip or drop -
Risk of injury!
Take care to position the jack only at one of the jacking points A or B under the vehicle,
ensuring that the head of the jack is centred under the contact area of the vehicle.
Otherwise, there is a risk of damage to the vehicle and/or the jack dropping - Risk of injury!
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F Extend the jack 2 until its head comes into
contact with the jacking point A or B used;
the contact area A or B on the vehicle must
be engaged with the central part of the
head of the jack.
F Raise the vehicle until there is sufficient
space between the wheel and the ground
to admit the spare (not punctured) wheel
easily.
F Remove the bolts and store them in a clean
place.
F Remove the wheel.