sorry for the late reply. I don't have access to an Audi bluetooth system, but please try, there is a chance it will work (depends on your phone too).
Know that I can give you a refund long after the standard 120 minutes refund timeframe. So take your time testing it for a few days even, and if it doesn't work out, just send me your order number (GPA xxxx-xxxx-xxxx-xxxxx) and I give you a refund.
Please let us know what you found, either way.