Work on the Model S sedan continues at Tesla. The all-electric sedan will offer a 160, 230, or 300-mile range battery pack, seating for seven, and a body fit for an Italian car. While questions still linger over Tesla's ability to deliver that car for the claimed $50,000 price, Tesla showed off a bare Model S chassis (pictured in this gallery) at the Detroit auto show. Most of the main structural components appear production ready, lending credence to the the car's summer 2012 release date.

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