I seem to recall there are ways to get to additional screens/information from the factory navigation system. I did a very quick search and came up empty. How can I get to these hidden areas of the nav? Thanks.

 

Not sure about the Nav, but here is a link to instructions for how to access the secret functions of the OBC, which display in the odometer. After you click on the link, you will need to scroll down to the section titled, "How to show RPM, Fuel Level, Speed and more on your Odometer Digital Display". Disclaimer: I have not tried to access these secret functions myself.

Accessing Secret Computer Functions