I own a 2005 golf and had the front discs machined and new front pads put on at a vw service centre, upon recieving the car a grinding/scraping noise was coming from the front when applying brakes, i returned it to vw and was told it had a stone in the pad and was charged to have it removed, upon recieving the car for the second time the noise was even louder, i returned it to vw and i am now being told its a faulty abs sensor when i had no warning lights in the car, the sound only came after the service centre machined the disk and replaced the pads can anyone help or offer advice with this situation?