Steering and drive wheels unlocking
 

When in Park, the steering wheel locks in one position. But, what unlocks it?
I assume it is not the key as there is a no-key option so it must be in the gear shift assembly.
My question - when the gear shift is in neutral, is the steering wheel unlocked?
We will be flat towing the Edge and with the key in the accessory position, all the lights are on. Most of them turn off with the key in the off position so much less battery drain.
Thank you!