I have to say what a bl**dy stupid design for replacing any rear bulb! You have to take the whole rear light cluster out, then once out struggle with 4-5 fragile plastic tabs on to remove the bulb panel on the rear of the cluster. Total rubbish on all my previous cars and any other non VW I have had you just take a little panel out in the boot and bingo!
On the plus side I went to see if the bulbs in my Dads Golf MKv were the same (not to swap one of course

It must be a con to get people to the dealers and charge an hours labour!!!
Just gotta see if Halfords stock the right bulb now.............