CITROEN DS3 Handbook page 175

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.
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.
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.
173
Child safety