Electric Connection: Tesla, Daimler

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Tapping Daimler's Expertise

Musk hopes that the deal with Daimler will help put some of the doubts to rest. "It's important to recognize Daimler is very meticulous," he says. "A huge part of their commitment is due to the Model S. They've gone through the Model S development costs line by line."

As part of the deal, Daimler will help Tesla with the new car's engineering. "Tesla is interested in some components, some knowhow, and some technology to add to their vibrant, very energetic startup approach," says Zetsche. In particular, Musk anticipates tapping into Daimler's expertise in areas like noise and vibration reduction, plus safety and quality. "They are very interested in helping us. They see us an important test case for market acceptance of electric cars," says Musk.

Tesla launched the Model S on Mar. 26. It claims to have more than 1,000 reservations for the all-electric sedan, which can carry seven people and travel 300 miles on a single charge. Tesla is asking for $5,000 deposits (or $40,000 for a special collectors' edition). The car won't be delivered until late 2011 at the earliest. "If they can get that thing on the road, they'll have a winner on their hands," says AutoPacific's Peterson. "The challenge will be to make an aluminum body at that price."

Daimler Investing in Batteries

There are questions as well for the whole auto industry as to which technologies will win out as it tries to respond to the demand for more efficient cars. Daimler is expecting that diesel-powered cars will be a major component of its strategy for meeting President Obama's tough new fuel economy standards. The company is working on hybrid gas-electric vehicles as well. But electric vehicles offer the potential for the greatest reduction in emissions. That's why Daimler has already invested in German battery maker Li-Tec, and has founded a joint venture with Evonik Industries to make its own batteries.

Zetsche says that Tesla's battery approach was "the fast one," but that he expects Li-Tec's version of the same basic lithium-ion technology to be more efficient. In the long-term, he expects, Tesla might consider using the Li-Tec batteries as well.

So Teslas may pick up a bit of a German accent. But don't expect the cars to be sold at Mercedes dealerships anytime soon. "In major markets, I want to control that customer experience," says Musk.

Palmeri is a senior correspondent in BusinessWeek's Los Angeles bureau. Carey is a senior correspondent for BusinessWeek in Washington.