Just got a Prius v 5 this week, having owned 2004 and 2008 Prii (plural?). Lost of possibilities as Entunes comes of age, but some problems--as numerous others have posted in the past few months. I could not find anyone who posted a comment about the map color. The default map color appears to be gray, making it quite difficult to read street names. Then, en route, the map background mysteriously turns a greenish-yellow that makes street names MUCH easier to read. Once I've been underway on an entered route for awhile (a non-reproduceable amount of time) the background color changes to become readable. It almost never changes to the better background when going slow without entering a destination on the map. This is not a function of day/night setting. It is not affected by the panel light dimmer and does not seem affected by whether the head lights are on (I have the AUTO feature enabled on the headlights). It does not change when one changes the color of the car's icon on the nav screen Nothing about this appears to be documented in the book. Looking at Toyota's YouTube videos occasionally shows a map screen that does seem to have a gray background but can't tell. Sometimes, as if to tease me, the map display is green at the far side of the screen but gray where I am in the middle. Has anyone else noticed this? Has anyone figured out the pattern or how to improve it? There are clearly several things that the 04 and 08 Prius Nav systems had down much better than the "new improved" nav system. Thanks for your opinions in advance.