i followed this instruction to fix mine, it rattled like a b1tch! took about 10 mins and 2 small bits of cork = no rattle. Every MK5 i have ever driven (about 10) have all rattled from the same place, but mine has been the worse by far. still easily fixed, but now i have rattle in the bloody door driving me up the pole

and you can be certain that wont be an easy fix.