Mine is a 57 plate and needed a key coding few months ago
Called a local guy who said he could do it and had done loads etc etc
Anyway he fooked it and ended up tripping the immobilisor into a lock down and timer appeared on dash saying cant start car for 300 minutes
Obviously had a huge barney with the guy on my drive way and told him fook off!
Took it to Chester Vw dealer and they charged me £40 job done which included a free vehicle health check
Moral of the story is just take it to a dealer unless you know of someone who is very competent to do it unlike the clown i got