I struggled with the same...I found a decent sweet spot on the adjustments...75% bright to max...but in general the backup camera at night is tough to see if there isn't any exterior lighting around.
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2010 BMW M6
2007 BMW 335i,2012 Audi S4-retired
2016 BMW 750i M-Sport
2015 BMW M235i-retired, 2022 M240i
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