BMW 5 Series: Switching between letters and 
numbers - Entering letters and numbers - iDrive - At a glance - BMW 5 Series Owners ManualsBMW 5 Series: Switching between letters and numbers

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

Switching between upper and lower

    General information
    1. Turn the controller: select letters or numbers. 2. Select additional letters or numbers if needed. 3. "OK": confirm the entry. ...

    Switching between upper and lower case letters
    Depending on the menu, you can switch between entering upper and lower case letters: ...

    See also:

    Closing Sunroof — Express
    Press the switch forward and release it within one-half second and the sunroof will close automatically from any position. The sunroof will close fully and stop automatically. This is called “E ...

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    Muting a Call
    To Mute a Call Turn the Menu knob to select Mute Call, then press SELECT. To Cancel Mute Turn the Menu knob to select Mute Call, then press SELECT. ...