I have a 2004 audi a6. In my old car i had a sirus player, but would like to just use the radio in my dash( looks better). My radio has the sat button. when i press it , it says no sattelite found. Is this becuase I need to buy that MMI sirus raido that audi makes for their cars. I am pretty sure once I install this it will allow me to set up the sirus account through my raido. Can anyone give me some advice, Thanks guys