So, another person experiencing similar issues to those described here, I have a slight additional point with regard to my issue and I wonder if anyone can offer advice on that too.
Firstly, I bought my '51 Cupra less than a week ago and whilst there was some moisture in it at that point the dealer assured me this was due to being left standing in the forecourt for 3 months. Seemed reasonable at the time since the battery was flat and it needed an electrical reset to get the boot open but on reading this thread, seems like maybe more like this type of issue.
As a addition, there was an amount of mold on the rear seat belt, passenger side and a general musty smell on test drive, but the valet cleared (read: masked) that for collection.
I have today noticed a wet (definitely more than damp, but not pools of water as some have described) rear passenger side footwell and wonder if this is the same issue.
At the moment I will be checking the drainage holes for blockages and pollen filter fitting this evening, but I suspect something more significant is afoot. Without seeing puddles in the footwells, is there any way to confirm that the door seals are the
problem here rather than say, a more serious leak due to corroded underneath bits (technical term!)
Seeing as there has been significant moisture in the car when bought, do you think that such a door seal issue would have caused this general moisture and sealing them up and drying it all out would resolve this? or should I be going back to the dealer and requesting they sort it for me? any opinions?