That’s the ‘second star to the right and straight on till morning’ button.
It converts the road to a Mario Kart Rainbow Road track. Be careful—there’s no one to save you if you fall!
Resets the location of the star in Mario Party.
Just push it and see what happens.
Activates your turbo boost.
If you use the Blue Link app for navigation, it’ll send the destination to your car.
That’s the ‘take me home’ button.
Just read the manual.
Engages light speed like Chewie.
It’s like lane assist but with stars! Collect them while your car nags you.
Guides you straight to Star Road.
Takes you straight Back to the Future.
The RoadStar button! It’s between the ‘B’ and ‘SOS’ buttons.
To infinity… and beyond!
Clearly takes you to the stars 
.
Guides you to the nearest bar with a star theme.
Ever played Mario Kart? 
Summons the second coming.