On - demand operation of ancillary units saves energy. (tcbmw.com)
At its core, the new BMW 4 Series Convertible has been engineered for performance excellence, while other features including Auto Start - Stop and on - demand operation of ancillary units help lower fuel consumption and emissions as well. (topspeed.com)
BMW EfficientDynamics technologies are naturally featured as standard in appropriate combinations on each model, with features such as Brake Energy Regeneration, a gearshift point indicator, active air flap control, and on - demand operation of ancillary units including a detachable a / c compressor. (press.bmwgroup.com)