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Check out the trick way you access the tire valve on this BMW Alpina B6

The wheels are one of the first things you notice when checking out the 2015 BMW Alpina B6 xDrive Gran Coupe. The 20-inch aluminum alloy rollers have 21 spokes that spray out from their hubs, creating one of Alpina's signature design features. But there's also plenty of function to go along with the stylistic form of this hotted-up BMW 6 Series Gran Coupe.
By rotating the Alpina roundel and unlocking the center hub, you gain access to the tire valve and bolts, which are hidden inside. They're literally kept under lock and key, and they protect your Alpina's wheels from the elements and theft. This unique center-fill system employing a hollow spoke isn't a new setup for the favored BMW tuner, but since Autoblog had one in our offices this week, we thought we'd take the opportunity to show the unique mechanism in case you haven't seen it before. Check it out in our brief video below.

BMW's plans for next plug-in i model, due after 2020

BMW entered the fight in the green car ring with gusto thanks to the one-two punch of the i3 and the i8. However, it seems that there could be a wait ahead before the German's i sub-brand is ready to land another strike at the market. "We are still in the strategic research phase where we brainstorm," Klaus Frohlich, BMW Group development boss, said to Automotive News Europe about the future vehicle. He indicated the next new model to bear the i prefix wouldn't arrive until after 2020. Frohlich also underscored that the sub-brand's products wouldn't be based on a standard BMW product. The German brand was at one point rumored to have a model called either the i5 or i7 on the way that would have added a plug-in hybrid drivetrain to the 5 Series. Frohlich's statement would seem to invalidate that possibility. Although, there's nothing stopping the vehicle from carrying regular BMW branding in the vein of the X5 xDrive40e PHEV. The current i-badged models won't just stagnate on the market in the meantime, though. "We have a minimum 20 percent battery density improvement every three years, thus over the i3 and i8's life cycle, we will offer more performance, more range or a combination of the two," Frohlich said to Automotive News Europe. Sadly, current owners won't be able to upgrade to the improved parts, though. Rumors about a third i sub-brand model go back years with much of the talk swirling around the i5. In addition to the speculation about a 5-Series-based version, there was also supposed to be a stretched variant of the i3 with that name, possibly even with a hydrogen fuel cell version. Although, BMW claimed the vehicle was purely "hypothetical." Related Video:

2012 Pebble Beach Concept Car Lawn offers a tutorial in cars to come

The Pebble Beach Concours d'Elegance is a showcase for some of the world's most exquisite vintage vehicles, but if newer metal is more your speed, the Concept Car Lawn is the place to be.
This year saw models from Bugatti, Lamborghini, Aston Martin, McLaren and Bentley as well as SRT, Hennessey, Infiniti and Lexus among others. The ultimate sampler platter of exotic and concept vehicles saw the Bugatti Veyron 16.4 Grand Sport Vitesse mingle with the Lamborghini Urus Concept and the mighty Hennessey Venom GT, though we found ourselves particularly smitten with the BMW Zagato Roadster and the Aston Martin Vanquish.
Not that we could go wrong anywhere we looked. The 2013 Bentley Continental GT Speed seemed perfectly content parked on the manicured putting green, as did the McLaren MP4-12C Spider. Get cozy with the full gallery below to see the smattering of metal on the lawn.