Had to top up the coolant a couple of times in the last few weeks, got vw to check it out they said they have pressure tested and found nothing, the car has done nearly 6,ooo miles, i bought the car at 3,000 miles I never topped my a3 up in 3 years. It seems to be a common problem on the mk 7 though , they didn't seem to be working on it long i also thought a pressure test would take several hours. any thoughts guys.