Do not even get me going on Sirius...
I have Sirius Radio in 3 of my cars. 2 Mercedes(E350,CL600) and a Porsche(911). The Sirius radio in my W212 works when it wants to. I call the company and they keep saying it is something on their end. The traffic guide works fine, the normal AM/FM radio is perfect and my Bluetooth audio is crystal clear...Sirius? Forget it. I was on the phone for almost a hour and I just gave up on it. It reminds me a lot of Direct TV. I love it when it works!