A tangent from the original question because it has been properly answered...
The fact that you CAN lock your Expi with the keys in it is an amazing feature. I am amazed that it seems to be a Ford only feature. Patented?
We bike, ski, hike etc with friends and I love that I can leave the keys in the vehicle, push the bottom two buttons as mentioned above and walk away. My wife or any other friend with our code can retrieve the vehicle if needed. Everyone else we play with has to hide a key or carry a key. There is routinely times where the needed key gets left in another shuttle vehicle or people end up waiting for the person with the key to arrive before they can access or retrieve that vehicle. Props to Ford for this feature.