Now that Autopilot have been announced, and as far as I have understood the feature is not yet enabled. Only the HW is present and OTA updates will eventually enable it. I wonder if all needed HW are present. If I should point out something I believe missing, then it would be a camera or radar witch looks back. How will the autopilot else verify that a requested lane change is actual safe to do....ultrasonic sensors cannot detect a fast moving car comming from behind - it could be 50 meters away and running 50 mph faster than your Tesla, I believe it would not, in all cases, be safe to pull out without the car verifying the traffic coming from back. You could argue that it is the driver’s responsibility to verify that, before requesting a lane change - but isn’t that going a step back. Autopilot should correct human errors and thereby awoid accidents.