Mercedes now on the hybrid wagon.

Mercedes-Benz, caught like other automakers in a regulatory squeeze to post higher fuel efficiency, may make the next generation of its flagship S-Class sedans all hybrids, a company official said Monday.
It would be the first time an entire conventional model line has been converted to an alternative powertrain. So far, gas-electric hybrid powertrains have come as options or in a handful of one-off models, such as Toyota's Prius, aimed at eco-conscious shoppers.

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