I think all e65 cars use the high disk, and the later models (facelift) have the NAVI03 DVD nav computer in the trunk. The most recent OS is the Version 32 which updates the NAVI03 to 09.08.02. What version is yours when you drill down and read it from the screen? The SIB for Ver.32 is on the boards, this one or also bimmerboard.com I think. I think the CCC system was/is in the e90/60/63 systems but not the e65/66. The way to access the current version on your nav is described on the boards.