Hello Haz,
So I was able to find it today in the Galaxy App store again, and it now works in the Honda with MirrorLink, but I had to open another MirrorLink approved app first. Then, you will get the side menu bar to show, and you will be able to get to the home screen of car mode on the car's infotainment system. Though, you will not be able to use Google Maps or Here Maps, which sucks. As that is what I was looking forward to the most to being able to use.
11/16 Update: The Car Mode app is only approved by MirrorLink while in park, it will forcefully close when in motion. Kind of a big deal if it truly did want to compete, or add a feather to it's cap, against Apple and Google's product...