we sent our fox 5's mac king for a ride, and you were just -- he was just blown away. take a look. >> oh, my gosh. it's changing lanes on its own. oh, my gosh, it's changing lanes on its own. >> wow, that is cool. >> reporter: last week, owners of the tesla s turned on their cars could now drive themselves. nothing. >> reporter: tesla apparently feels so confident in the new auto drive capability, an e-mail from a reporter's gmail account a couple of years later might land me behind this steering wheel doing little steering while driving 50-something miles an hour on manhattan. officially, tesla describes vehicles running the software as semiautonomous, supposedly requiring the driver to drive at all times. >> if i were to want to change lanes -- >> with auto pilot engaged, said vehicles change lanes, brake, steer, accelerate, decelerate and avoid obstacles by themselves thanks to a camera that reads road signs, a forward radar, a gps system and 12 ultrasonic sensors, giving the car 16 feet of awareness in any direction all working together to say change lanes on a winding crowded urban highway without any assistance