Thanks for the response. So what is the most likely cause of the noise? I guess I am unsure of what needs to be replaced. I have a subscription to alldatadiy, and my w203 service dvd is on its way I was looking through my alldata guide, and the job doesnt look to bad. But its the kind of job I like to have someone around the first time who has done this before Since this is my daily driver, I need to make it a one day deal, so I need to have all my ducks in a row before I start. Quack quack