Have you driven one? mine is 3 months old and has has a suspension rattle from new and is getting worse. VW Germany knows of this fault and i am awaiting a technical investigation as my car is not the only one with this fault. Mine is a 5dr 2.0 GT Man and the fault is particular to this model. It does not seem to be able to cope with undulations or repetitive small bumps it does get very uncomfortable. My Mk 6 was a fantastic car it had 18" Vancouver alloys and had a much better ride than Mk7 on 17" std alloys.
It is a rear suspension problem only as the front is fine and copes with all manner of road surfaces as one would expect.