I'm getting a 2013 Model S 85 soon, and according to the window sticker, its current radio is the "200 watt 7 speaker stereo with am/fm/hd radio, supports mp3, aac, and mp4 music formats". I don't know if that is the base radio or upgraded one. Anyway, I need to get a Sirius receiver and add in Sirius so I can continue to listen to Howard Stern and certain 80', 90's, and comedy channels. So how hard will this be to add? Does the S radio have an AUX input jack? A USB? Or will I have to do it the hard way and have a stereo shop manually wire the Sirius receiver to each speaker to bypass the Tesla sound system? My S has the black painted roof, so I have no problem with attaching an antenna to it, be is magnetic or double sticky tape. I can run the antenna wire through one of the rear windows, no one will ever be back there anyhow. Ideas?