Saving a function
1. Highlight the function via the iDrive.
2. 
Press
the desired button for more
than 2 seconds.
See also:
Controls
1 Screen, left
2 Screen, right
3 Center armrest, remote control
4 CD/DVD player ...
Trip computer
There are two types of computer.
"Onboard info": the values can be reset as
often as necessary.
"Trip computer": the values provide an overview
of the current trip.
...
DTMF suffix dialing
DTMF suffix dialing can be used for gaining access
to network services or for controlling devices,
e.g., to make a remote inquiry of an answering
machine. The DTMF code is needed for this
purpose. ...