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.
"If everything seems under control, you're just not going fast enough"
River City Bimmers BMW CCA
2005 X3 3.0i
ZPP, Htd seats, Htd strng, Black Sapphire on Terracotta.
M3 Coupe, Steel Gray Metallic on black leather, HK, three pedals.
1991 E30 325ic, AW, Black Leather, Black top, Three Pedals.
Last edited by X3-terrestrial; 09-02-2012 at 09:59 PM.