Hi, my car A6 C7 3.0BiTdi has just been in for diagnostics at B'ham Audi. Mechanic took for a drive could feel the judder a bit but had no idea what was causing it, and no diagnostic code registered. Same problem as reported above happens at low revs when crawling in traffic mainly. Its also intermittent but suspect it will get worse. I'm going to try and run this by them and see what they say. I have an extended warranty on car but its not an audi warranty. Good thing is they didn't charge for the diagnostic!
