I had TV on an E46 BMW M3 and the reception on it was absolutely rubbish in a built up area, and barely tolerable anywhere else. It's what prevented me spending GBP700 on same on my RS4. I stand to be corrected if the Audi system is spectacularly better, but my quite deep knowledge of TV aerials would suggest that the required signal strength for decent reception is going to be very limited from two 2 foot wires in sheet of glass, relying on a reflected signal (i.e. from buildings etc) with no line of sight to a transmitter. And, remember, it's not Freeview either (which actually needs an EVEN better signal) so you have limited channel choice. I really really would wait for someone to tell you I'm talking rubbish and that it works real well before using this as a justification to install all this kit.
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