Interest in Mazda 6 and already a question

Hello dear Mazda driver! I’m new here because I have a great interest in a Mazda 6 limousine. So on a certain one I have looked at today. I once attached a picture to which also my question refers. As you can see on the picture, the car has tinted windows, but only on the side windows?! The rear window is “normal”. Is this the case with Mazda or does he possibly get a new rear window? Overall, I’m really excited about the car and would like to buy it. Are just small things, for which I need a bit of clarity before that. Thank you for the help 🙂