I guess I didnt check it at the dealer. I have an 06 with NAV, and I received a key with a trunk release button. I bought in Nevada/California, not Canadian. The trunk release button does not appear to do anything.
Did you try holding it down for about 1.5 seconds? When I just got mine I clicked it like I would to unlock the doors but that is not enough, needs to be held down a bit longer.