I purchased a 2013 Edge Limited about 3 months ago from a dealer here in Michigan. Have a noise (whining) starting at about 45 mph with noise sounding like a loud hum. In reading other forum posts, this noise seems to be somewhat common in the Edge. Took the car back to the dealer and they said it was a tire noise. They rotated the tires and said to give it some time to "wear" on the new location. This did not stop the noise. I just purchased four new tires and the noise is still there and even louder. Any idea what this may be?
