I replaced my rotors and pads on my Benz, and have similar sounds. I put premium rotors with ceramic pads and they squeek and grind ( no clunking though) enough for me to have twice taken off the wheels and put silicone behind the pads, which works for a while....hey the pads will last a long time......I would not use them again, and remembered that I have in the past tossed expensive ceramics and put back "cheaper" pads. This is one example of cheaper is better....for the street...
