If the brightness knob on the gauge cluster is set to max brightness it won't go into night mode when the lights are on. Just one notch short of max brightness and it will toggle to night mode when the lights are on. Maybe that is the problem?
Thanks so much Smiley81 for asking this question. I have been trying to figure this out myself and finally I have an answer. Thanks also to Nodnerb (yippy)my Nav unit never goes from day to night when I have it set to Auto. I have to manually change it at night when the bright screen becomes blinding. Anyone else have this issue or know if a fix? thanks