You don't. So far it's only available outside of the USA, for whatever stupid ass reason. (Though it is starting to appear that it might be able to be retrofitted after the fact)

So where do the ventulated seat buttons for driver and passenger go? do they take up the last two spares?

And the buttons for heated driver & passenger seats, do they go above the buttons that control the air circulation?

The ventilated seat buttons are up top next to the AC controls, so they do not take any spares. The heated and ventilated seats are the same button I believe or at least they are on mine.

So how does that work? a button to turn on heat, usually has 3 levels of heat? so how can the same button turn on the cool air for ventulated seats?

I don't get that one either since the button seems to only have 1 led on it per function. My guess is that the duel button is a rocker type button, but does the led get brighter each time you press the heated side or something? Can someone explain?
Update. Never mind....just read it in the manual on the home page. It basically turns the system on and then it pops up on the idrive where you can apparently adjust it from slow simmer to fat-burning mode. I should have guessed.

Ok, thanks, answer that question. So what would the last 2 spare butons be for then, any guesses!

Last 3 spare buttons. And that was the reason for my post!

Wonder if someone else on the forum may have the answer?

tick, tock, tick, tock,

Ok, lets assume that buttons 1 & 9 are false buttons because they look like a blank as they are different to the others?

That leaves number 7, ok a birthday cake for the first person to come up with the correct answer?