If it is not installed it usually says, "Telephone not Installed", not available suggests you do have a kit of some sorts. Check to see if you have a microphone in the central lighting dome, either drop the dome down or look through the grills for the microphone to see if you can see daylight. To pair your phone, just turn on the ignition to light up the dash, search from your phone with bluetooth for an AUDI UHVxxxx device and the pin code is 1234 as standard although this can be changed by previous owners of the car.