Overview: The name BMW is synonymous with performance, precision, engineering, a fastidious quality. Obsessively designed, owners drive the "ultimate driving machine" for the sheer pleasure of controlling a mechanical marvel on the open road and feeling G-forces in their gut. Now, NGC takes viewers inside the creation of BMW's newest sports cars: the Z4 Roadster. See first-hand how this $45,000 ultimate roadster, with its unique styling and flawless quality, is built by three ultimate factories.