I had the chrome bulbs on several of my BMW's as well and I liked that it got rid of the yoke color in headlight housing.
The coding option is clearly listed under Front Electronic Module (FEM) as marker lights under lighting. See my screen shot.
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Current: 20 M340i
Sold: 19 x3 30i X drive, 18 230i X drive Convertible
18 x3, 30i X drive 16 428i Convertible, 16 X1 X drive, 14 i3 Rex, 14 328i, 14 x1 28i X drive, 08 328i, 03 M5, 99 323i Convertible, 00 z3 M Roadster, 99 328i, 00 323i
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