I want to set my gauge brightness at max at night but my nav screen also switches to the day screen(white). Is it possible to keep the gauge brightness at max while keeping the nav screen at night mode(black) ?

Click DISP button and adjust the contrast and brightness on the bottom of the screen.

nop you can't. the best you can do is to do it as max as possible without getting to the max

+1. Yep, I've tried and can only do what Henry is suggesting

Same here. Another solution is change the nav screen to the Compass so you dont go blind at night, lol... I used to drive like that but then my eyes started hurting after a while

Don't you have the max brightness button on your left drop down panel?

yes we all do, read the question again...

You know what???? You just answered a mystery I had. Thank You

Setting Max brightness makes your NAV screen go into day mode all the time!!!! Thats why!!! Daaaaaaamn

yes that is correct Sir .