JDM said:
I will be waiting until I take delivery of the car and then hitting them with it as I feel that saying something beforehand lessens your chances of getting something out of them as you could simply cancel your order if you aren't happy!
disagree a bit with this as then you are stuck with the car! but if you complain in the meantime, they might offer you something else as a way of compensation but when the car is ready for your collection, there is usually no buyer that decides to walk away.
I cancelled my order after the test drive as didn't think will be happy with 20i engine, which is a shame as the car looks gorgeous but needs more power and more rumble IMO. I haven't had hill assist on any of my cars and not bothered about it, but if you guys really want it, I am amazed that as Andrew said only 2 people have only mentioned it. if the dealer says it is there, tell him/her to put it in writing because they can deny all knowledge of verbal conversation.