Tesla reveals its first profit while curbing the lowest-range Model S

In a surprise announcement late Sunday, Tesla Motors says it turned a profit for the first quarter of 2013, delivering more than 4,750 all-electric Model S sedans and beating its own forecasts. It's a major milestone for the start-up automaker, which also revealed a few last-minute Easter eggs for those waiting for their cars to be delivered — and a play to improve the value of its cars when those owners decide to sell.

Tesla had said it expected to break even on a cash basis this quarter during the ramp-up of Model S output at the factory in Fremont, Calif., with a goal of delivering 4,500 cars to owners. Since Tesla doesn't sell its cars through dealers and puts the key fob of the Model S directly in an owner's hand, it can't count the money from sold vehicles until that swap; traditional automakers mark a car as sold for accounting purposes when it leaves the factory.

"Tesla is here to stay and keep fighting for the electric car revolution,” said Elon Musk, Tesla Motors co-founder and CEO in a statement. “I would also like to thank our customers for their passionate support of the company and the car. Without them, we would not be here.”