CITROEN Grand C4 PICASSO Owner's Handbook Manual page 276

Practical information
Parking the vehicle
Immobilise the vehicle where it does not
block traffic: the ground must be level,
stable and not slippery.
Apply the parking brake unless it has
been programmed to automatic mode,
switch off the ignition and engage first
gear * to block the wheels.
Check that the braking warning lamp
and the P warning lamp in the parking
brake control lever come on.
For greater safety, place a chock 2
against the wheel opposite to the one
being changed.
The occupants must get out of the
vehicle and wait where they are safe.
Never go underneath a vehicle raised
using a jack; use an axle stand.
* Position R for an electronic gearbox or P for
an automatic gearbox.
274
List of operations
Remove the finisher from from each of bolts using the tool 4 (depending on equipment).
Fit the security socket 5 on the wheelbrace 1 to slacken the security bolt (if fitted).
Slacken the other bolts (no more than a 1/4 turn) using the wheelbrace 1 only.