You might want to call Newmar and check as to whether or not you radio can receive Sirius. Newmar does not run the wire and install the antenna needed for Sirius on all their coaches. I have a 2011 MADP with a radio that says Sirius right on it but when I went to have it connected I found out that I didn't have the antenna needed. So just because the radio is capable of receiving Sirius that doesn't mean you can actually get it.
Dean & Heidi, 2011 Newmar Mountain Aire DP