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ENGINES. The BMW TwinPower Turbo petrol engines feature remarkably agile power delivery and excellent responsiveness, even at low engine speeds. At the same time they are more efficient, with fewer emissions and better performance than their predecessors. The new BMW TwinPower Turbo diesel engines are characterised by outstanding responsiveness and agile power delivery at all engine speeds. They are also breathtakingly dynamic, highly fuel-efficient and produce few emissions. VEHICLE CONCEPT. Thanks to targeted aerodynamic measures, every BMW boasts excellent air resistance figures. This has a positive impact on efficiency and driving stability, and reduces the level of noise in the interior. These features include the flat undercarriage cover and the Air Curtain in the front apron. ENERGY MANAGEMENT. In conjunction with the navigation system Professional, the ECO PRO Analyser evaluates the driver's driving style – before, during and after a journey – and how efficiently they accelerate, brake and change gear. This information appears on the display during the journey. These useful ECO PRO tips help the driver to adopt an even more efficient way of driving. The eight-speed Steptronic transmission ensures smoother gear shifts and greater driving comfort, thanks to fast engine speed transitions and short shift times. It unites outstanding comfort with impressive dynamics and increased fuel efficiency. The route-ahead assistant is a function included in the ECO PRO mode and it helps the driver to adopt a more efficient way of driving. In conjunction with the navigation system Professional, it recognises bends, built-up areas, roundabouts, T-junctions, speed limits and motorway exits along the chosen route and gives tips in advance about when to stop accelerating. Whenever the driver takes their foot off the accelerator without braking, the coasting function (a component of the ECO PRO mode) cuts the power between the engine and drive in vehicles with eight-speed Steptronic transmission. The vehicle rolls along without any resistance from the engine, which rotates at idle speed consuming a minimum of fuel and with minimal emissions. The Optimum Shift Indicator shows the most efficient gear for a given driving situation. This display appears in the cockpit of all BMW models with a manual transmission or the Steptronic transmission (in manual mode) and helps the driver to drive more fuel-efficiently, especially in urban traffic and on long-distance journeys.