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The Mercedes E250 Bluetec concept was unveiled at the New York motor show, as part of an offensive to win over the American market to clean diesel technology.

Powered by a 201bhp 2.2-litre four-cylinder diesel engine mated to a seven-speed automatic gearbox, the E250’s nitrogen oxide emissions are reduced by the use of a urea solution that’s placed in the exhaust stream. The urea tank has a 25-litre capacity, meaning it only needs topping up at normal service intervals.

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The E250 is a great motor, but I fear it's a little late to try and get the US into diesel - the cost of oil's too low, plus with the GM Volt technology coming along nicely diesel becomes irrelevant when the motor runs at constant revs and diesel is still a lot more polluting.

How come the US will get the E250CDi with the 7 speed gearbox, that really isn't fair!

Sorry to be a pedant, but '46.8mph on the motorway'...*ahem*.

I think its great, there are diesel garages in the US but not as many as petrol; but with the vast mileage they do diesel is a good option and I can see it starting to expand its influence; it is a great way to increase the mpg (converted or otherwise!!) and with the reduction of the correct emission types that is really good!!