I remember something very strange like the bottom bulb running pwm on the high filament for run. It was all weird back there. That may not be accurate it was a while ago. I just remember it was strange that the top lamp wasn't wired to use the bright filament just the dim .

Mine is now wired to light all bright filaments for brake. It's a lot of light make no mistake when I'm braking

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)