Is there a brightness adjustment ??? I guess not.

If you can get brighter reverse lights, it will help, too. On my current 05 Ody, the reverse lights are very bright, and the rear view camera at night is very good. Once I had a burnt reverse bulb, and could not see a thing thru the camera !

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His : 2013 X5 3.5d Deep Sea Blue/Black/Aluminum with ALL packages, 20" 214"s, running boards, Adaptive Drive, Spare Tire, BMW Apps
On Order : 2016 X3 3.5 MSport Silver/Mocha with DHP, CW, Prem, Tech, DA, Lighting

Hers : 2015 328xi MSport Silver/Red

Prior:
2008 X5 4.8
2011 X5 3.5d
2010 335 xDrive
2013 335 xDrive