typical 2 wire bosch alternators with internal regulator require a 3W bulb on the D port with a live on the other side of the bulb, otherwise the alternator wont start or umm excite.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)