Thanks Gilly for the info. The year of my ML430 is a 1999 Model. I think the noise is coming from the back, not the front. It does it when I slow down to turn, like at a stoplight, and also when I put it into gear. I got out and made sure that the brake lights do work, they do. Could this also cause the mileage and fuel indicator, the one located in the overhead console to not function?