I have a bit of a problem, when I slow down, I hear a bit of a graunching sound from the brakes, it sounds like the rears, metal on metal. It happpens when at low speeds or just before grinding to a halt. My front pads have loads left, but although the rears look a little thin, they have a bit left on them. I have done a search and all I seem to come up with is rear calipers binding, can anyone hazard a guess? Its a 52 plate Leon Cupra if that makes the blindest bit of difference!