Ok... removing the rotors on the front of my 560SEL was the single hardest thing that I have done. What a pain. When I got them off and took them in to get turned, they told me they couldnt turn them. So I bought new ones and installed them. Now it no longer squeals!! So after three weeks of chasing the squeal, it looks like I finally got it. Thank you to all of you who helped. Though it was difficult, your advice kept me in the game. Thanks again!!