Car Panel - Navigation button in bottom right disable??

[springy]

In the car panel app, the bottom right hand corner, the navigation button is always disable.. Does any one know how to enable it and what it is use for?

 

[El Presidente]

Don't you need to pay for the navigation? Is that why it's disabled?

 

[springy]

Oh is that the reason why... Can't I change the button to point to google navigation.. that would be brilliant.