Volkswagen The Golf 2004 Service Training page 51

Multi-function buttons
Button illumination is controlled by terminal 58d.
There is only one symbol code, which
communicates information from the button via
the steering column switch module to the
CAN data bus. For this reason, button functions
can only be carried out individually.
If no telephone is installed, the telephone buttons
are non-functional.
After several minutes, the system detects if
a button is sticking and will disable the function
until the button is released again. All other
buttons remain functional.
Button symbol Description
Switch to basic telephone
menu,
various sub functions, such as
caller list, make connection
Accept call, make call
Mute selection
of audio sources
End call
Switch (mode) between FM/
AM audio sources,
CD-changer and CD (radio)
Next track/start station search
Previous track/start station
search
Volume up
Volume down
S319_025
51