All Sports come with the mixed cloth and "leather" seats at minimum. This is one of the main reasons I went to the Sport over the Big Horn (along with the fact that the Sport has minimal chrome). You can't get the darker interior on the Big Horns like the Sports have. I don't have heated or ventilated seats though.
I have the 8.4a and there is a soft-key in the Climate Control panel for the rear window defrost. The hard button isn't exactly clear on what it activates. I guess it activates the mirrors and rear defrost. I'm not a big fan of the cold/hot buttons (I don't have auto climate control). I wish it was a knob as the button is slow to adjust temperature.
This is from the User's Guide: