The biggest news about the tiny little 1 series is that BMW debuts several new technologies with it's introduction: Brake Energy Regeneration (iGR) - The system uses an Intelligent Alternator Control (IAC) and an Absorbent Glass Mat battery to recycle previously lost energy, in turn saving fuel. This is achieved as the IAC reduces drag on the engine by only engaging when required to charge the battery , whereas a traditional alternator is always pulling power from the engine. Additionally, the energy generated by the engine on over-run (under braking or descending a hill) was previously wasted. Now this lost energy is utilised by the IAC to charge the battery. iGR alone is responsible for a three per cent improvement in fuel economy . Automatic Start-Stop function to cut fuel consumption. Standard on all manual transmission models (except 130i), the system automatically switches the engine off when the vehicle is stationary and the driver puts the car into neutral . To restart t...