I have been trying to set my dimmer & picture settings for months. I have read & reread the manual. No matter what I do the pane is unavailable. I tried to reset the system but it is also greyed out. I have also pulled the power which appears to reset the system.
When my headlights are out the picture is much too dim & I'd like to make it brighter/adjust color & tint as well.
Please do not say RTFM, I have to the point I can practically quote it.