Don't break the glass! It will make you mad at yourself later.
I broke a window to my car once cuz I locked me out in a remote location and we do not have triple AAA although BY GOLLY one day I should get it again because they are super handy.
I was like, this is gonna be faster and cheaper than just replacing the window.
As it turns out, sourcing a window from a junk yard and then installing it, is in fact fairly cheap. It is also, as it happens A LOT more complicated than I thought. I wasn't happy. I was single then. Otherwise one of the husbands would have been assigned the task, but NO. It sucked.
Anna