Are we only looking for 335i's?
I know there are at least two 328i Coupes, including mine, at Microsoft campus in Redmond. Both are Space Grey.
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E92 328i Space Gray, Gray Leather, Gray Poplar, Step, ZPP, ZSP, ZCW, BMW Assist, Nav + iDrive, Sirius, CA, Logic 7, Rear Sunshade, Pirelli P-Zero Nero M+S, Formula One Pinnacle 35% tint