from what i found when i was looking for a
cupra
coil pack issues (not sure if its just MY03s)
wet carpets as mentionned
duff OEM stereo's that had a fault
any other receipts of warranty work
general issues when looking at a 2nd hand car in general as mentionned
Heated seats-i dont think any have ever had it
Washer jets for lights-quite safely say no (drives me a bit mad having to clean the lights frequently as i do alot of motorway and long distance trips).
Nice cars, VAG build and reliability so you cant go too far wrong.