See also:

Requirements
Via the Control Display, set a language that is also supported by the voice activation system so that the spoken commands can be identified. Set the language ...

Look well ahead when driving
Avoid unnecessary acceleration and braking. By maintaining a suitable distance to the vehicle driving ahead of you. Driving smoothly and looking ahead reduces fuel consumption. ...

Have maintenance carried out
Have vehicles maintained regularly to achieve optimal vehicle economy and operating life. Have the maintenance carried out by your service center. Please also note the BMW Maintenance System ...