Switching between letters and numbers

Depending on the menu, you can switch between entering letters and numbers:

Switching between upper and lower

    See also:

    Six generations of the BMW 3-Series: The success story of a global trendsetter
    If there is such a thing as a quintessential BMW, it is without doubt the BMW 3-Series. The 3-Series is everything a sports sedan should be, and for years it has stood undisputed at the summit of ...

    Interior
    Even though it's relatively unchanged for 2009, the X3's interior remains very upscale for this segment. My test car's dark brown leather upholstery and black dashboard made for an especially clas ...

    Opening the main menu
    Press the button. The main menu is displayed. All iDrive functions can be called up via the main menu. ...