From the owner's manual, page 253 (ok, it's for a 2011, but still):
http://www.fordservicecontent.com/Ford_Content/catalog/owner_guides/11tauog3e.pdf
If you cannot move the gearshift lever out of P (Park) with the ignition
in the on position and the brake pedal pressed, it is possible that a fuse
has blown or the vehicle’s brake lamps are not operating properly. Refer
to Fuses and relays in the Roadside Emergencies chapter.
If the fuse is not blown and the brake lamps are working properly, the
following procedure will allow you to move the gearshift lever from P
(Park). Note: For some markets this feature will be disabled.
1. Apply the parking brake.
2. Remove the cup holder insert.
3. Using a screwdriver (or similar
tool), remove the protective cover
to the interlock release access hole
on the console.
4. Insert the screwdriver (or similar
tool) into the access hole and press
while pulling the gearshift lever out
of the P (Park) position and into
the N (Neutral) position.
5. Remove the tool and reinstall the
protective cover.
6. Start the vehicle and release the parking brake.