[tty2300]

The front window defrost has always been an option on the air con dial and the rear is a button

[BeetleB]

>The front window defrost has always been an option on the air con dial and the rear is a button

This hasn't been the standard for a long time. My 2003 and my 2015 cars both have them both as buttons.

[Angostura]

Front window defrost has as icon that is wider at the top than the bottom. The rear window icon is typically a rectangle.