In the glove compartment

Push the handle up, arrow 1, and open the lid, arrow 2.
See also:
Deactivating HDC
Press the button again and the
LED goes
out. HDC is automatically deactivated
above approx. 37 mph/60 km/h. ...
General information
The iDrive functions can be stored on the programmable
memory buttons and called up directly,
e.g., radio stations, navigation destinations,
phone numbers and entry points into the
menu.
The ...
2012 BMW 3 Series Sedan: First Look
Competes with: Mercedes-Benz C-Class, Infiniti G37, Audi A4
Looks like: A little bit bigger outside, just a teensy bit bigger inside
Drivetrain: 240-hp, 2.0-liter twin-turbocharged inline-four cylin ...
