Efficient Dynamics

BMW's common rail injection involves managing the fuel injection at every stage from pre injection to delivery with one common rail. This improves fuel delivery and power delivery.[7]

The stop-start feature will automatically switch off the engine when the car is idling at a complete stop. This reduces fuel consumption while idling for extended periods. The engine automatically switches on when the brake pedal is released, turning your steering wheel (which activates power steering), or shifting from park. In manual gearbox models neutral needs to be selected and your foot lifted from the clutch for the engine to stop. It will restart when the clutch is depressed again. It should also be noted that in some cases the engine will automatically restart without user intervention.

The alternator is generally charging the battery only when the car is braking, coasting or decelerating. The Brake Energy Regeneration system continuously monitors the battery's state of charge, and can, if necessary, charge the battery even when accelerating in order to prevent it from becoming discharged (when the battery is charged to less than 80% of its capacity).[8]

The air vents in front of the radiator grille will open up to allow for air to cool. They will automatically close if it is not in use, reducing air resistance and fuel consumption. A feature on the first edition, 2009, it doesn't appear on later editions.

The power steering is only active when the steering wheel is turning. If it is kept in a constant location or place, the electric power is inactive.