Ferrari California Workshop Manual page 1340

Tighten the indicated screw fastening the
headliner.
Tightening torque
M6x18 screw
Fit and fasten the deflectors, tightening the
indicated screws.
Tightening torque
Screw
Fasten the rear part of the headliner trim to the
panel.
Ensure that the seal overlaps the headliner trim.
Nm Class
9 Nm B
Nm Class
5 Nm B