I have just had my 2.0-litre Volkswagen Golf emissions fix and there is now a top end knock/rattle that my local Volkswagen garage say they are unaware of. The car is so loud that it is unsalable. Why have Trading Standards not got involved with this issue? There is also a hesitation on acceleration and the only thing the dealer has said is that it is a coincidence. We don't have a leg to stand on, they say they have done hundreds and are unaware of problems but then say it is a Volkswagen issue, not a dealer issue.