Interior Liftgate/Luggage Compartment Lid Release Switch
WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.
The interior liftgate/luggage compartment lid release switch is a momentary contact switch integrated into the headlamp switch. When the button is pressed, the headlamp switch sends the request to the BCM over a LIN. The release switch only operates when the doors are unlocked electronically.