Went out yesterday with my missus driving to further investigate. She couldn't believe how loud the whistling was. Without doubt the noise changes/stops when pushing (just left of the rear view mirror) against the windscreen. The seal appears to be good and it certainly doesn't leak when raining but clearly something is not right. Interestingly enough I took the local dealers Works
MCS demonstrator out and it makes exactly the same noise!
Look on the NAM website loads of others have same issue.
Finally bit the bullet and booked mine in to have it sorted, will have to wait a couple of weeks to find out whether they are able to resolve it.
