I have a set of pre-facelift s4 Xenons and am planning on fitting them into my car which has standard pre-facelift lights.
are these plug and play or do they need adapting? the wiring connector looks the same but looking at some web pages they show different set ups for factory fitted xenon light replacements and non xenon set ups so they will be plug and play.
so will I need to mod the wiring so these fire up when fitted to a car that does not have xenons from factory? or should I just sell these on?