CITROEN DS4 Owner's Handbook Manual page 169

Child seat at the rear
"Rearward facing"
When a "rearward facing" child seat is installed
on a rear passenger seat , move the vehicle's
front seat forwards and straighten the backrest
so that the "rearward facing" child seat does
not touch the vehicle's front seat.
"Forward facing"
When a "forward facing" child seat is installed
on a rear passenger seat , move the vehicle's
front seat forwards and straighten the backrest
so that the legs of the child in the "forward
facing" child seat do not touch the vehicle's
front seat.
Centre rear seat
A child seat with a support leg must never be
installed on the centre rear passenger seat .
Ensure that the seat belt is correctly
tightened. For child seats with a
support leg, ensure that the support leg
is in stable contact with the floor.
167
Child safety