My 2009 sDrive 35i came with the standard audio system. While I did get the iPod interface kit, I did not get a factory installed satellite radio. Additionally, I did not get iDrive. I am wondering what would be involved in getting Sirius satellite radio installed at this point. It is listed as a $350 option on the BMW USA web site with the following description: "Sirius is seamlessly integrated with the controls of your BMW's CD radio." On the Sirius web site, they show a SiriusConnect Universal Vehicle Tuner that is described as being designed to match with "Sirius-ready" head unit. Presumably that includes the BMW head unit. This tuner retails for $70. So, here's what I'm wondering: - Is the $350 dollar option from BMW a dealer installed option that can be added to the car after delivery? - Do you think the $70 tuner from Sirius would just plug into the BMW head unit and start working? I look forward to hearing from anyone who has some experience in these matters. TIA.