Agreed, I would not accept rattles on a £30k car. My 4 year old Scirocco recently developed a creaking noise, turned out to be a dodgy spot weld, the dealer charged me £200 to fix.
I also had a rattle from the rear of the car, I did have it booked back in to the dealer when I stumbled upon the issue, the black rubber bump stops on the edge of the tailgate needed adjustment. Fixed it myself and all ok now.