24th Aug 2011, 11:13
Your problem is the exhaust. It's the part that looks like threaded steel. My A6 had the same problem. Took forever to figure out.
13th Jul 2012, 16:45
Clunking could be suspension or mounts, but check for yourself if you can, to avoid being taken advantage of at a repair shop. Light enough noise to be called rattling could be exhaust related; heat shield, catalytic converter etc.
I have seen people panic over what they feared would be the worst, and it turns out to be a hundred dollar exhaust repair.
25th Feb 2008, 07:53
To the person with the undercarriage rattle:
Check the driveshaft bushings - I had the same problem with my '99 A6 Quattro and a rebuilt driveshaft is what it took to cure it.