So after talking to an Audi Specialist at a dealer about satellite radio, he said that Audi is no longer offering XM and they're only having Sirius in their future models.

I've been wanting to get XM installed in my A4 ever since I got it 2 weeks ago, and my local dealership (in NJ) is offering the XM tuner on sale for $125. The original price goes around $700.

Because this is such an amazing deal, I wanted to give you guys a heads up for anyone who wants to get an XM tuner installed in their Audi. Prices may vary, but see if your local dealership is having a similar sale.