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.
See also:
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 in the instrument cluster
The selected speed is displayed
in the speedometer.
► Green: the system is actively
braking the vehicle.
► Orange: the system is on
standby. ...
Tire inflation pressure values up to 100 mph/160 km/h
320i
328i
335i
...
