Due to the size and material used on the brakes of these vehicles, the brakes may start to squeak around the 50 percent wear point. The brake rotor surfaces become uneven, causing a lip to form at the outer edge of the rotor. Because of this, the rotors are usually replaced when the pads are worn (pad life varies depending on driving style and terrain).Google+
Car Problem Reports
Mercedes-Benz C350 Replace Brake Rotors When Pads are Worn and Squeaking
Mercedes-Benz C350 Problem
Replaced pads and rotor ar 25000 miles. Now @ 45,000 I am looking to replace the pad and rotor again. I have Ford 2001 F150 never needed break job until 75,000 miles.
Visitor, 2009 Mercedes-Benz C350, 5,000 mi
Sqeaking in right front wheel area when slowing and braking at a slow speed. Brake has been cleaned and suspension checked. Squeak never heard by service, it comes and goes. Cleaning brake didn't correct.