My '04 E350 squeaks loudly when I turn the steering wheel to the right. It's not a belt screech, I know what that sounds like. It doesn't do it when turning left, and it doesn't do it unless the steering wheel is actively being turned. I can turn the wheel to the right and it will squeak as the wheel is turning, but then it stops as soon as I stop turning the wheel. Follow? The noise is coming from under the front end somewhere. Any ideas?