CITROEN C4 Handbook page 168

Practical information
After use
When travelling without a trailer or
load carrier, remove the towball and fit the
protective plug into the carrier, to provide
clear visibility of the number plate and/or its
lighting.
Fitting the towball
► Below the rear bumper, remove the protective
plug 2 from the carrier 1.
► Insert the end of the towball 5 into the carrier
1 and push it upwards; it will lock into position
automatically.
166
► The wheel 6 rotates a quarter turn anti-
clockwise; take care to keep your hands clear!
► Check that the mechanism has correctly
locked into place (position A).
► Close the lock 7 using the key.
► Remove the key. The key cannot be removed
while the lock is open.
► Clip the cap onto the lock.
► Remove the protective cover from the
towball.
► Attach the trailer to the towball.
► Attach the cable on the trailer to the safety
eye 4 on the carrier.
► Lower the connection socket 3 to put it in
position.
► Insert the trailer plug and rotate it by a
quarter turn to connect it to the connection
socket 3 on the carrier.
Removing the towball
► Grasp the trailer's plug, perform a quarter
turn and pull to disconnect it from the connection
socket 3 on the carrier.
► Lift the connection socket 3 to the right to
stow it away.
► Detach the trailer's safety cable from the
safety eye 4 on the carrier.
► Unhitch the trailer from the towball.
► Replace the protective cover over the towball.