What I noticed that CCFL screens are very unhappy about all that power on/off business, they can stay on and last for a long time and tend to live shorter life if on/offed frequently.
I can understand E53 body as production started in 2000 and design work probably well before that so CCFL was one of the best options (space and brightness wise) then but 2008/9 and on vehicles... It is strange that LED backlight was not implemented in those units.

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2009 Range Rover Sport SC HST Limited Edition
2014 Infiniti Q50 AWD