The auto lock feature automatically locks your doors when your speed exceeds 8Km/H. I tend to lock my doors instinctively when I get in the car, and I would have asked them to enable this on delivery had I known about it. However, I only learned about it by reading the manual, and will have to have this feature activated during my first service. Hopefully the douchebags don't charge me for it. [BTW I have a 05 B6]