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Mercedes-Benz B-Class aerodynamics tested [w/video]

Mercedes-Benz has produced a video testing the aerodynamics of its new B-Class – which it claims is the most aerodynamically efficient car in the world – using a wind tunnel and fluorescent paint. The W245-generation B-Class has the lowest aerodynamic drag in its segment with a Cd of just 0.26, thanks to features such as serrated front wheel arch spoilers, optimized cooling airflow and a Pagoda roof to help airflow over its profile. The car's aero properties were put to the test at the MIRA vehicle test facility in the UK using fluorescent paint in 60mph winds to highlight its flow dynamics, only visible under UV lights.

Ultra-rare Steyr Puch 500 goes to auction

£18,000 might seem like a lot of money for a car based on the original Fiat 500, but this particular Steyr Puch example is one of just 33 ever built. Austrian firm Steyr Puch entered into an agreement with Fiat in 1954 after production was halted during World War II, and began production of the 500 under licence. Only 33 right-hand drive examples were ever produced, and of those only two survive; this example and one in the Steyr Puch museum in Austria.

Renault Clio Expression Eco: A perfect commuter car

Renault Clio Expression Eco - makes any electric car seem profligate We hear so much about how electric cars make the perfect commuter car. They can manage to do a fifty or sixty mile round trip a day, don’t need a tax disc and – for those going in to London every day – there’s no congestion charge to pay. There’s also the negligible cost of electricity to charge the car (for now, at least) and the zero emissions at the point of use.