the Model S had its underneath the floor, which gave extra storage space in back and improved
handling because of its low centre of gravity;
this battery placement was used on later Tesla models.
The Tesla Autopilot, a form of semiautonomous driving,
was made available in 2014 on the Model S (and later on other models).
Tesla built stations called Superchargers in the Tesla built stations called Superchargers in the
United States and Europe designed for charging batteries quickly and at no extra cost to Tesla owners.
Later versions of those stations also had the capability of complete replacement