i would check the warranty bit anyway mate, there is a common issue with the mk3 beeza and rusting under the rear window. A lot of people got theres done, there was a thread started about this and who was planning and on who actually had it done and i know that a vast majority of them hadn't had any corrosion check etc. Not disagreeing with you adam but just saying it's well worth checking as Seat were leniant in a fair few cases. Go to them, tell them the story, manager usually comes out, fills in a form, takes a couple of pics and tells you should hear something in 2/3 weeks