OK there maybe a problem with upgrading to v14.7 from v13.
You need to check your SD card size, the new version is 16.34 GB and the standard VW card that came with my car is only 16GB, v13 just scraps in at 15.49GB.
As has been highlighted before unfortunately I could only get the upgrades to work using the VW card that came with my car rather than a third party card.
What do others think about asking dealers to see if they have any bigger cards that might give out FoC, effectively the maps are only going to get bigger so I really need a 32GB otherwise I'm going to be stuck on v13 unless I go to map option 2 which should be smaller as it has less countries listed.
Maybe they'll have a few spare now the MK8 has done away with the SD cards for satnav.