Anyone know how to enable walk away lock on 2012 TL sh awd Advanced. Want the car to auto lock when I leave
my car.

 

Not possible. Your car doesn't have this feature. But TLX has.

 

4G does not have this feature but you can just press the button on your handle and it will lock all the doors as well.

 

If you accidently unlock car and don't touch the handle or open the door, it will auto-lock it. There is an option in the MMI for the timing of it and hence the 'confusion' on the feature. It does not have a leave and auto-lock feature.