My Euros plugged right in. The three pin connector still connected directly to the headlight bulb, and fog light ad it's own self contained connector. The only pin connectors I use are for the turn signal. Are the pin connectors attached to the housing or the primary bulb?

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1995 E420 152k
1991 300D 2.5 348116 daily driver
1992 300E 2.6 196k-work in progress(head gasket)
2002 BMW 745Li 93k