Glass Window

B463 uses 
B470 covers shooting through instead of leaning out
B559 says Brittle with minimum DR of 5.
==trait==
Rather than viewing windows as the "eyes" of a car, a better approximation might be to give the car No Eyes and yet give it Nictitating Membrane
No Eyes means you cannot inflict blindness on the car (or more importantly, it's passengers) so the membrane DR could represent the structure that protects the vision of passengers.
Switchable NM could be windows that roll down.
If the DR on the windows is high enough to impede vision, that might be represented as Poor Vision or even Blindness on the car, a disadvantage which the passengers would suffer when looking out (as they rely on the senses of the car) except for those with Penetrating Vision who are able to ignore the sense limitations of the car.
==see also==
*G Large Glass Window
*g Small Glass Window