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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 reveals new seven-seat 2 Series Gran Tourer [w/video]

Everything is turning up Gran over at BMW these days. The 4 Series and 6 Series sprout extra doors to become Gran Coupes. The 3 Series and 5 Series get weird rooflines to become Gran Turismos. And now the 2 Series Active Tourer has grown an extra row of seats to become the Gran Tourer. What we're looking at is essentially the same mini-minivan/tall-hatchback that emerged almost exactly a year ago as the first front-drive model in BMW's history. Only in the guise of the new 2 Series Gran Tourer, it's been stretched to accommodate that third row of seats to give it seven-seat capacity – which was to be expected, of course, but is still fairly impressive considering how compact this vehicle actually is. It may be less than ten inches longer than the five-seat Active Tourer, but it's still smaller than just about any seven-seater on the market, and to hear the Bavarians tell it, it's "the world's first premium compact model to offer up to seven seats." Those seats are optional and can fold under the floor, and the middle row splits 40:20:40 and folds flat at the push of a button to give the 2 Series Gran Tourer a flexible cargo capacity ranging from 22.7 cubic feet all the way up to 67 cu ft. All of that in a vehicle no longer than a Ford Focus, which even in European wagon form can only swallow 53 cu ft with the seats folded – and you can forget about the extra seats in the Focus. European buyers will be able to choose between five engine options with three or four cylinders and ranging from 116 horsepower to 192. Available all-wheel drive might make you forget it's riding on a front-drive platform altogether (but not likely). Either way, the five-seat Active Tourer hasn't found its way to US showrooms, so we won't expect to see this new seven-seat version here either. At least not for the time being. But we'll surely have the chance to check it out in person for you next month at the Geneva Motor Show. The new BMW 2 Series Gran Tourer. 11.02.2015 With the new BMW 2 Series Gran Tourer, BMW has carved out yet another new vehicle segment. With its generous space, versatility and groundbreaking flexibility, the BMW 2 Series Gran Tourer is the world's first premium compact model to offer up to seven seats and fully meet the mobility requirements of young families. Compact yet capacious.

BMW reveals M4 safety car with innovating water injection system [w/video]

Racing series don't just pick their safety cars at random, or use just whatever car is lying around. These days the car that sets the pace at the front of the pack is typically provided through consideration by a sponsor. In the MotoGP series, that's BMW and its M division, which have served up the Official Car of MotoGP since 1999. What you're looking at is the latest, and it packs some innovative technology on board. Aside from the matte black wrap with BMW's iconic striped livery, upgraded aero kit, retrofitted interior and emergency equipment, this BMW M4 coupe packs a new injection system under the hood. Only instead of injecting fuel, it injects water into the combustion chamber – something that wouldn't usually be recommended, but BMW insists actually aids in the combustion process. The idea is that the temperature of the air being mixed with the fuel inside the engine is usually hotter than ideal, so the system injects a fine mist of water into the collector in order to reduce the air's temperature... sort of like one of those hydrating misters at an amusement park or outdoor mall, but in an even hotter environment. The system brings the temperature of the air down to a more optimal temperature, helping it combust better. The process is said to yield a number of positive effects. For one, it reduces knocking. For another, it can make more out of lower-octane fuel where higher octane isn't available. It also can control the adverse effects of higher ambient temperature on the combustion process. But most of all, it increases output and reduce fuel consumption by around eight percent. Whether that eight percent is worth the added weight of the system – particularly with water pump and a 1.3-gallon tank in the trunk – is up for debate. But we'd imagine that the Bavarian engineers have weighed very carefully. Of course there's also the matter of refilling the water tank, which BMW says would be carried out whenever the safety car is refueled, but in real-world conditions would only necessitate attention once every five top-ups at the gas station. By now you might have guessed that BMW probably didn't develop this system just for the MotoGP safety car, and isn't planning on keeping it confined to the racetrack. Instead it's being tested and demonstrated on the safety car before being rolled out on production models in the future.