Hi all, My t is also a 2003 model and I found out 2 weeks after I got the car. When parked on a slight downhill the chanels around the bood fill with water and then it runs into the car from underneath the rear windscreen. I had to get all my carpets and interior changed as the were soaked. They gave me a loan car and I tried the same thing and guess what, same problem. When the car was at the dealer with the window out you could see that where there is supposed to be sealant there is nothing, it only goes halfway round the join. Hope this helps