Me too (not on the ghibli)Sounds like you picked up a stone or something and it's stuck in the disc ?
I have had this hsppen to me before.
What was the verdict on this... i have this issue also, and its constant, not when the brakes are being used.Well guys I left my house the other day when this noise started coming from the front brakes! Check it out for yourself.
The dealer replaced all the break pads and resurfaced all four rotors. I do not have the service record with me to tell you what the exact cause was.I had roadside come and get it this am. This isn't normal. Sounds like a dust shield or something is caught or grinding. It changes with the direction of the car as well.
I called in and they said don't drive it. I'll post back when they let me know.