PEUGEOT 308 Handbook page 208

Safety
Child seat in the front *
"Rearward facing"
When a "rearward facing" child seat is installed
on the front passenger seat , adjust the seat
to the fully back and highest position, with the
backrest straightened.
The passenger airbag must be deactivated.
Otherwise, the child would risk being
seriously injured or killed if the airbag were
to inflate .
* Refer to the legislation in force in your country
before carrying your child in this seating
position.
206
"Forward facing"
When a "forward facing" child seat is installed
on the front passenger seat , adjust the
vehicle's seat to the fully back and highest
position with seat backrest straightened and
leave the passenger's airbag activated.
Ensure that the seat belt is correctly
tensioned.
For child seats with a support leg, ensure
that the support leg is in firm and stable
contact with the floor. If necessary, adjust
the the passenger seat.
Passenger seat in the fully back and
highest position.