CITROËN C4 Picasso Owner's Handbook Manual page 273

Place the jack 3 in contact with one of the
two front A or rear B locations provided on
the underbody, whichever is closest to the
wheel to be changed.
Extend the jack 3 until its base plate is in
contact with the ground. Ensure that the
centreline of the jack base plate is directly
below the location A or B used.
Practical information
Raise the vehicle until there is sufficient
space between the wheel and the ground
to admit the spare (not punctured) wheel
easily.
Remove the bolts and store them in a clean
place.
Remove the wheel.
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