Tesla Motors, the electric automaker, plans to roll out its latest software upgrade-version 7, which includes autopilot features-worldwide to owners of its Model S sedan on Thursday.br Tesla CEO Elon Musk made the announcement via a tweet this weekend.br He also answered some of his Twitter followers' questions about the new software.br The new software has been available to a select group of Model S early testers for weeks and is expected to be widely available on Tesla's new Model X sport-utility vehicle.br The Model X began shipping in very limited volumes mere weeks ago.