Ive noticed an awful rattle from the front of my s4. I finally narrowed it down to the caliper retaining spring, or lack of in this case..Both front calipers are missing this spring..Is anyone able to point me in the right direction as to where to get these.. Audi say they dont have them on any diagrams so cant help me.. There saying they might come with replacement pads but the pads cost a fortune from Audi.. Anyone braking a B5 S4 on here? Cheers