I think all cars with AP produced in late 2014 should have it. Open the app on your phone to see if there's summon button at the bottom of the menu. It's a really useful feature but I also use it to show off to people who don't know what a Tesla is and are interested in knowing more about it. It's funny though, off all the features that the car has I've noticed that it's the summon feature that has people speechless when they see the car move by itself... besides actually getting into one and seeing how it drives.