Angela,I had the exact same issue, at over 50 the noise went away. I had my in and out of the dealer for 5 months, last time for 3 weeks, it is a '15 and within 2 weeks after purchase it made the noise. Mine needed spot welding in the "a" pillar (where the pillar meets the roof). The noise was a spot the size of a flat toothpick that was not welded, so the paint was rubbing together when cold. When over 50 the metal expanded enough not to make the noise. My best advise is to be persistent with your dealer and contact Ford or BBB to resolve the issue. This is what I did and so far so good, no noise. I do sometimes have another noise, which is an actual magnet out of place, as the magnet can be moved and the noise stops. But your issue sounds exactly like my struggle. If there is anything I can help you with let me know, as I know the frustration with this issue.