Looks like some weird conversation problem between another modeling Software and Blender. I know that Maya and 3ds Max (maybe?) having their own smoothing "groups" and shading conventions. If i seperate the piece, adjusting the edges and faces .. (weird hard edges selection..) and seperate the front pieces.. i get at least a better result. I also think, there is a problem with the material instances.
Really interesting, i never saw something like this xD