Hey!...Just a thought on this. I'm a quality tech at G.M. and deal with the dealerships every day on customer feedback on issues such as this. It's referred to in the category of N.V.H., Noise, Vibration and Harshness, or anything the customer would consider "annoying". In my personal experience (20+ years) I think the new technology in automobiles has gotten some of us accustomed to the fact that we should hear no noise, feel no vibration and experience no harshness in a new vehicle.Not to make light of your wife's complaint, but unless it is unusually distracting, "interrupts conversation at normal levels, radio at normal levels", etc..., I don't think it is something that the dealer or Ford will address in this case.