I am almost done configuring my 645ci or 650. But found out that my car will not have the green band windshield. If I get the heads-up display, my car cannot get the green band windshield. So what is the purpose of the green band windshield?

I am also puzzle that a car of this price does not have ventilated seat option.

Tiggerfink,
The Greenband Windshield is the tinted portion of the window.
Many manufactures have stopped adding the tint, and use a dot matrix design instead. This allows more visable area of the window.
I prefer the tinted band it helps on bright sunny days.
As for the seats I agree?
Regards,
Tim