As a testament to its success in starting the four-door coupe movement, the Mercedes-Benz CLS is nigh on its second version, yet competitors have only recently begun to crowd the room. With the Audi A7 about to gain membership in the club, BMW couldn't hang back, so it has reportedly slapped a sales date on the 6 Series Gran Coupe concept: it'll be here in 2012.
Rumored for the summer of 2012 by German publication Automobilwoche, that puts its introduction a year behind the next-generation 6 Series. Engines are said to be a mix of gas and diesel, and BMW evidently spoke of a potential hybrid application. Perhaps most importantly, design cues such as the frameless doors and LED lighting will be carried into production. Those trick exhaust tips, however, not likely. Follow the jump for a video walkaround of the exterior and check out our high-res gallery below for a refresher.