I have just picked up an A3 sportback 64 plate. And the Bluetooth and telephone function do not work. I get Bluetooth deactivated warning and when I select activate it return saying Bluetooth function is not available. I have scanned the car using vcds and getting this error. I have also went into the mmi and check software and the screen returns software version as UNDEF. Does anyone know what the issue could be and also if I can update the software as under the update section I can select SD if I could get the download file to do it myself. My car's got got the extended warranty and Audi want £60 for a diagnostic. Thanks.