On-demand control of ancillary units saves energy

Intelligent energy management in the new BMW 3-Series is further enhanced by the ancillary units, which consume significantly less energy compared with conventional systems. Examples include the on-demand coolant pump, the electronically controlled oil pump and the electromechanical steering system, which only consumes electric power when steering assistance is actually required. The special air conditioning compressor featured on many of the sports sedan models works on the same principle. As soon as the driver switches the air conditioning off, the belt drive to the compressor is disconnected by a magnetic clutch, to minimise power drain.

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    Controls
    Buttons at a glance 1 System on/off, interrupt 2 Resume speed 3 Store speed* 4 Store, maintain/change speed Switching on Press the button on the steering wheel. The marking in the speedom ...

    Display on the Control Display
    Display the computer or trip computer on the Control Display. 1. "Vehicle Info" 2. "Onboard info" or "Trip computer" Resetting the fuel consumption or speed 1. &q ...

    After the ignition is switched off
    The roof can still be operated for approx. 1 minute, as long as no door has been opened. ...