Thanks for the link, it took me a while to figure out how to make it work. I was in what Tiralc called the * setting which creates different brightness adjustments, one for the instrument cluster which you change with the +- buttons next to the trip odometer selector, and one for the touchscreen which you change with the brightness slider on the touchscreen. In this mode I find the touchscreen too dim even at maximum brightness.
In the moon mode the +- buttons next to the trip odometer selector control the brightness for the instrument cluster and touchscreen simultaneously. In this mode I was able to get the touchscreen a little brighter.
But I’ve got to say the moon mode seems puzzling. Having both screens independently adjustable seems to be the only option necessary, as long as the range of adjustment is broad enough to be useful. This seems like some manager gave programmers too much leeway, making it more confusing than it needs to be.