Both glass panels should "tilt" if you push the button. (also known as the "vent"position).
It should open to the comfort position if you slide the Button backwards once, it should open completely if you slide a second time. All these is in the manual.
There's no way to prolong the life of the sunroof that I know, I just use it regularly, it works perfect every time.
Last edited by X3-terrestrial; 09-02-2012 at 08:59 PM.