Get a brick, and smash the window. That's it.
I had to do this to my XF because I locked my keys inside. But what surpsied me is that I spent 10 minutes looking suspicious lurking around the carpark looking for a brick, whilst people were watching me. When I finally did break my own window, heaps of people noticed, but said nothing and did nothing. "Hmmm...." I thought. So I waited a few minutes inside my car waiting to see if police would show... nope.
Anyway... the moral of this story? People don't call cops when your car gets broken into. These days I don't leave ANYTHING in my car, not even in the ash-tray. The way I figure it, if someone does break in, then they won't even get 5 cents from me, and hopefully, this will discourage them from breaking into anyone elses.
BTW, I'm also selling my other car (the one that I didn't smash with a brick)
FOR SALE: Fairmont Ghia EF '94 - 156,200Kms