I'm trying to find out whether or not the calliper carriers need to be removed to be able to replace the rear discs on a Quattro. I've already had a go at taking them off without removing the carrier without any luck. I've loosened the disc and had it nearlly off, but the edges of the carrier are stopping it. Is there a special method to do this? Or am I wasting my time trying to find a way? Do the carriers need to come off it? If so I'll have to take it to a garage as I can't for the life of me release those bolts (I have the M14 spline bit and I've put a fair amount of penetrative oil and strength into it too).