hi , im just wondering how do i fit m3 head lights with bi xenon to my e46 coupe 318ci. there is one more connection i dont know what to do with, mean small extra plug on ballasts.
what is taht 4????
i tlooks the same as level regulation but taht plug is on the housing.
5 connections all together on the lamps. 4 plusgs in the car!! confussed.