Chris is right, they should be white, this is just an evolutionary thing. As we all know, those white thumbscrews turn ungly yellow-ich in time, so BMW restocked in black but still under the same bmw part number. So no, the black ones are not a bat thing or any special CSL equipment. At the time I restored that car, I ordered 6 pieces from BMW: two came in white, four in black! I installed black ones while looking for NOS white ones. Luckily, the white ones became available again but by that time, the car was gone. So, I guess I still owe six white screws to the new owner.