Hi all, just recently had my R in at the good techs in VW to check out this mysterious rattle noise which was like in stereo sound every time I went over bumps (all the time up here, with our roads lol) Was like locating a needle in a haystack to them, after over THREE days of total labour time (warranty work off course) and minus a complete back quarter, the prob was the cable from the battery terminal to the main electrics under the rear seat had came loose from the factory seal!!
So if anyone has a similar prob, try that first, save your car sitting naked in workshops for ages, cheers........