as of today, the sirius satellite radio update has been released. It is available for all '04 models which are pre-wired for it with the exception of the 203 coupes, 170's and 163's built before 11/10/03. they are in short supply for all 220, 215 and 211 models, but the rest should not be too hard to find. I've got a couple in so i imagine any dealer with some amount of pull will have them as well.