Business offices (especially in the hotter parts of the region) have this type of window...polarized glass.

I don't think it's a factory application, but rather, an aftermarket film. Polarized automotive glass is not DOT approved...

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car