I'd go with Jimble and call VW Customer Services to find out where you are regarding the build date. As already said, if you are more than a week away from confirmed, you should be able to make changes (but understand this could push it back further). I know people say stuff like keyless is a gimmick, but my take on things is that anything surplus to making the car go forwards, backwards, turn, and be as safe as it can be, is unnecessary to the act of getting from A to B, so if you want it, and it can still be added, go for it.