The steps here outline the process after the final paint process is complete. The panoramic roof, drivetrain and battery modules, tires, wheels, and badges are installed, and then the Model S enters the testing process.
The battery of tests is fairly standard, including a final inspection on a bamboo-floored, LED-lit platform, where workers ensure body fit and finish. Each Model S is also tested for water-tightness, then, finally, driven through the company's indoor confirmation track. It's the only indoor confirmation test track in North America, enabled by the fact that Tesla's cars produce no emissions.
For more details on the 2012 Tesla Model S, visit our preview here.