yeah, definately the pcb on rear of clocks, no water ingress anywhere on my car, you can see where it shorted after the condensation built up during the snow and the car being sat (i found condensation dripping off screen and forming pools on dash top). will never buy vag again (at least this model), now mine needs recoding to vehicle as it wont start as it acts as part of immobiliser circuit but i could pay £60 for this to find that it still has the original fault. lowest price for my unit seems to be £231 plus vat then as above for a seat specialist to programme it to car but would need towing to the garage as it wont start without. my advice would be to bite the bullet and get it done, trade it in during summer or geat seals sorted to
help and take a chance. (This is the case on my car anyway, i'm an experienced technician and its taken me weeks of electrical fault finding to get this far) good luck, hope you fare better than me