The micro hybrid drive technology in the smart fortwo mhd uses a start/stop function that automatically switches the engine off at traffic lights or in a traffic jam, and back on when things get moving again. The mhd switches the engine off as soon as you brake and fall below a speed of 5 mph. When the time comes to set off again, take your foot off the brake pedal and the engine seamlessly restarts, automatically engaged in first gear ready to continue your journey. This reduces both fuel consumption and CO2 emissions. In fact, the smart fortwo mhd's start/stop generator enables a fuel saving of up to 29% in urban settings and 11% for combined urban and extra-urban driving [1], all without compromising on performance or comfort. smart fortwo mhd is available on our 61 bhp and 71 bhp pure, pulse and passion models from October 2008, with mhd turbo petrol engine models to follow in 2009. Combined fuel consumption for 71bhp coupé of 65.7 mpg / 4.3l/100 km[2], combined CO2 emissions of 103g/km[2]; combined fuel consumption for 71bhp cabrio of 64.2 mpg / 4.4 l/100 km[2], combined CO2 emissions of 105g/km[2].

[1] Calculation basis: A comparison of the official fuel consumption figures for the smart fortwo coupé 71bhp (52kW) and smart fortwo coupé 71bhp (52kW) mhd showed that the smart fortwo micro hybrid drive coupé consumed approx. 29 % less fuel in the urban cycle and approx. 11 % less in the combined driving cycle. The consumption figures may vary depending on the actual traffic situation and individual driving style.

[2] The data supplied does not relate to an individual vehicle and does not form part of an offer, but is intended solely for the purpose of comparison between different types of vehicle. The figures stated depend on the tyre dimensions.