Check the tire inflation pressure regularly

Check and, if necessary, correct the tire inflation pressure at least twice a month and before starting on a long trip.

Low tire inflation pressure increases rolling resistance and thus raises fuel consumption and tire wear.

    See also:

    Deleting contacts
    Only contacts that are stored in the vehicle are deleted. The contacts on the mobile phone cannot be deleted. 1. "Office" 2. "Contacts" 3. Highlight the contact. 4. Open &q ...

    Safety
    Both the coupe and convertible have front airbags plus side-impact airbags built into the front seats. As required of all 2012 models sold in the U.S., the 640i has standard antilock brakes and an ...

    Terminating the voice activation system
    Briefly press the button on the steering wheel or ›Cancel‹. ...