So when I read this option description - "Vehicle locking and unlocking as well as engine start without active use of the key" - it seems clear to me that you don't need the key to start the car. However, I've read a couple of posts that say that a "dummy key" is still used to start the engine. My current car has a smart key that I never need to take out of my pocket, and I love it. So is this option really not what Porsche describes and do I need to use a key to start the car? And if so, why even consider this option for $800+??????