Central Door Locking (CDL) Interior Switches
WARNING: This page is about a different car, the 2020 Jaguar XE and 2019 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.
Lock and unlock switches adjacent to each interior door handle allow the door latches to be activated from inside the vehicle. When pressed, the switches connect a ground to the related door module. The lock switches incorporate a status LED (Light Emitting Diode), controlled by the related door module, that illuminates when the doors are locked during a drive cycle.