Quote:
Originally Posted by andrewwynn
I have all exterior lights LED and coded out. On the rears on many bmw cars there are enough lamps the car will use a backup set that are usual running lights and convert them to brake function which looks weird because not symmetrical but still gets you brake on both corners. Not sure if any e53 had that ability but e90 has and I suspect e70 also.
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The e53 certainly DOES do this, at least on the front. If you lose a halo (angel eye) lamp, the signal/indicator lamp on that side is lit at half brightness to substitute for the missing halo lamp. I think the same happens for headlights, with the fog lamp being used as a substitute.