The 2012 Mercedes S350 BlueTec will make its North American debut at the 2011 Detroit auto show.
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The S350 will use the same 3-liter turbocharged V6 that's in Mercedes' other clean diesels.
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Technical specs for the 3-liter V6 turbocharged diesel in the S350 haven't been released, but that same engine in the ML350 produces 210-hp and 400 ft-lbs. torque.
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The S350 is Mercedes fifth clean diesel vehicle in the U.S. It follows the E350 and three diesel SUVs.
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Pricing hasn't been released for the S350, but clean diesels usually carry a $1500 premium over their conventional gas counterpart. However, no tax incentives remain in 2011 for alternative fuel vehicles.
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The Mercedes BlueTec system uses AdBlue, a urea-based liquid that, when injected into the exhaust stream, converts 80 percent of the nitrogen oxide into ammonia.
