So in sitting with a service tech discovered how to access some of the diagnostics.

Access at your own risk.

First is a diagnostic screen.

Hold the SETUP button on the center console and flip the headlight switch between OFF and ON 3 times. You get this screen

 

The second screen is called "Service Menu". To access hold the INFO button on the center console and turn the headlight switch from OFF to ON 3 times. You will end up at the first pic. To fully exit the service menu you must turn the car off and back on then hit OK in the 2nd picture.

Access at your own risk

 

Interesting find, wonder if it's the same on the 2010-2013 navs? I guess I'll find out.

 

Cool!!! Can you adjust settings or anything in there?

 

Not sure what is available for adjustment/settings. He just went into service menu for a quick check of product info and I discovered the 2nd by accident. Have not had a chance to play, maybe when the weather is warmer.

 

I got to the first screen , where is the info button? I can't find it .. Please show me ..

 

The INFO button is just above the SETUP button to the right of the screen.

 

I don't have nav ... The info button is not there ....

 

Can't help you there. My only suggestion is to try hold down any of the other buttons while flipping the headlight switch to see what pops up.

 

This is listed as starting in 2021 but something for 14-20 owners to check as an alternate method to start infotainment diagnostics versus the headlight flash.

 

For anyone interested, pictures of the full sub menus (pulled from a 2016 Premium) are as follows:
https://imgur.com/a/cqeHFR2