See also:

Head restraint adjustment
To raise the head restraint, pull it upwards. To lower it, press the lug A and down on the head restraint at the same time. ...

Sitting comfortably
Driver's seat Forwards-backwards Height Manual adjustment Electric adjustment Seat back angle ...

Checks
Unless otherwise indicated, check these components in accordance with the servicing booklet and according to your engine. Otherwise, have them checked by a PEUGEOT dealer or a qualified workshop. ...