Switch off any functions that are not currently needed
Functions such as seat heating and the rear window defroster require a lot of energy and consume additional fuel, especially in city and stopand- go traffic.
Therefore, switch off these functions if they are not actually needed.
See also:
Vehicle care
Car care products
BMW recommends using cleaning and care
products from BMW, since these have been
tested and approved.
Car care and cleaning products
Follow the instructions on the container.
...
Reference
This chapter contains technical data, short
commands for the voice activation system, and an
index that will quickly take you to the information
you need. ...
Activating HDC
Press the button; the LED above
the button
lights up. ...