How sure are you this will work ? 
I'd put my mortgage on it

As for adding options and getting VW UK to help you, I very much doubt it.
I had a similar thing with my Golf order. I wanted to add the heated seats and the dealer said it had "just" got a confirmed build week so couldn't alter the order. They said the would try though.
Came back to me and said it wasn't possible.
So I phoned VW UK at Milton Keynes as I thought the dealer was just saying that.
First operator said, sorry once you get a confirmed build date you would have to cancel the car and re order if you wanetd to change the spec.
Being the untrusting person I am I phoned back another twice as I thought I would go for best of 3 answers

One operator was optimistic and actually took my details and said he would contact Wolfsburg direct but came back with the same answer as everyone else.
If you want to add or amend your order once you have a confirmed build date you will have to cancel and reorder.
Has the camera definitely been added? Its still not on the configurator, although that doesn't surprise me.