What's the last 7 digits of your VIN?
Not sure why you're looking for rails specifically, for looks? Because in terms of functionality, roof rails are designed to be a mounting place for roof racks. Given most BMW's already come with roof rack mounting points, pretty redundant.
And if you can, snap a picture of your roof. Is that cover you're talking about silver, like in this photo? If it is, that's the roof rail.
