Model X doors and trunks will lock automatically if you have the key with you when you walk away. If your door or trunk is open, it will lock once closed. While inside your car, you can lock and unlock your doors with the touchscreen as long as your key is inside with you. Just click on the lock icon to access the controls.
You can set your doors to automatically unlock when you put your car into park by pressing the following selections on your touchscreen in order:
If you’d rather, you can also unlock your doors by pressing the Park button twice (that is, once to park and once to unlock).