The BMW radio/tv/nav computer has a number of settings not available from the normal mode. To enable these hidden settings you need to perform the following:
- Turn the ignition key to 'R'
- From the main menu screen select "SET"
- Enter the "SET" option by pressing the rotary selection button.
- Press and hold the "MENU" button until the Navigation Service Mode is displayed (at least 8 seconds).
- The hidden options are now available.
- Press the "MENU" button to exit the Service Mode.