Tonksy said:I had similar problem with my previous F.
Sussed out that the whistling noise was happening because:
Where the roof clamps down at the front, if you look there is a rubber edge on both sides (rubber edge that is attached to the edge of the front window on the corner). After a little bit of bending the offending side rubber around i found that when the roof was closed it made a better seal and stopped the whistling noise. If that makes sense??