Upvote:3
The best thing is to indicate with your hands that the window doesn't work, you should do this by keeping your hands visible at all times so the officer can ensure their safety. The officer has probably pulled over people before whose windows don't work and I'm sure they'll understand.
As Willeke suggested this will be unlikely that all the windows cannot be opened, if this is the case you can laminate a sign saying something like:
Window doesn't work please use passenger window
Alternatively, maybe the officer can pop the door while holding it, just enough that you can talk through the crack.