Justin Sullivan
A Tesla Motors Model S is displayed in the Tesla showroom before a news conference at Tesla Motors headquarters on May 20, 2010, in Palo Alto, Calif. On May 9, 2013, Consumer Reports awarded the vehicle its top score - 99 out of 100 points. The Model S tied a Lexus 460L full-size luxury car tested in 2007 for the magazine's highest ever score.
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A Tesla Model S electric car is on display during the second press preview day at the 2012 North American International Auto Show on Jan. 10, 2012, in Detroit, Mich.
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Elon Musk, CEO of Tesla Motors, talks about the Model S electric vehicle during the press preview for the world automotive press at North American International Auto Show on Jan. 12, 2010, in Detroit.
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In this June 22, 2012, file photo, Tesla workers cheer the first Tesla Model S cars sold during a rally at the Tesla factory in Fremont, Calif. The Tesla Motors Model S electric car has tied an older Lexus for the highest score ever recorded in Consumer Reports magazine's automotive testing on May 9, 2013.
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Tesla Motors CEO Elon Musk and chief designer Franz von Holzhausen drive the new Tesla Model S all-electric sedan out into the street as members of the media look on, at the car's unveiling in Hawthorne, Calif., on March 26, 2009.
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Tesla Motors CEO Elon Musk and chief designer Franz von Holzhausendrive the new Tesla Model S all-electric sedan as members of the media look on, at the car's unveiling in Hawthorne, Calif., on March 26, 2009.
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Tesla Motors CEO Elon Musk and chief designer Franz von Holzhausen drive the new Tesla Model S all-electric sedan, in Hawthorne, Calif., on March 26, 2009.
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A Tesla Motors Model S is displayed in the Tesla showroom before a news conference at Tesla Motors headquarters May 20, 2010, in Palo Alto, Calif.
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The Tesla Model S is introduced at the 2013 North American International Auto Show in Detroit, Mich., on Jan, 15, 2013.
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Tesla Motors CEO Elon Musk talks about the Model S electric vehicle during the press preview for the world automotive press at North American International Auto Show on Jan. 12, 2010, in Detroit.
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Tesla presents an "engineering view" of their Model S sedan showing the underlying technology during the first press preview day at the 2011 North American International Auto Show on Jan. 10, 2011, in Detroit.
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The Tesla Motors logo is seen on the hood of a car at Tesla Motors headquarters on May 20, 2010, in Palo Alto, Calif.