Originally Posted by southlight
I don't see the CF itself, but the fact that the roof ledge (don't know if it's the right description; I mean the part where a roof rack would be mounted) and the shark fin antenna is black seems to be a strong hint. The roof itself is painted or covered to disguise the CF structure.
Scott hinted that BMW did it the same way with the M6 prototypes:
I'm not saying the new M3 won't have a CF roof. I think the odds are likely it will. However, black trim and a black antenna are hardly good evidence at all of a disguised (painted) CF roof. Have there been any sightings at all of an M3 mule with an unquestionable CF roof. I don't remember.