Hi all, I've owned my A6 for around 6 months and it had just had a pair of front brake discs fitted when I got it. I never thought the brakes felt brilliant, but now, although they seem to have plenty of stopping power there's a judder when braking. It almost feels like ABS, even when braking quite lightly. Looking at the surface of the discs, they have 'grooves' and also appear to have other marks around the disc. Obviously this isn't right, and I don't ever remember having this on any previous cars, as the discs should be smooth.