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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 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.

BMW plugs in new X5 xDrive40e PHEV crossover

BMW broke with its own convention when it rolled out the original X5 back in 1999, and did it again when it launched the i3 and i8 plug-in hybrids in 2013. Now it's bringing the two together with the reveal of the new X5 xDrive40e. Based on the third-generation F15 model and previewed by the X5 eDrive concept at the 2013 Frankfurt Motor Show, the X5 xDrive40e is the first PHEV from the core BMW brand. Its hybrid powertrain pairs a 2.0-liter turbo four (itself good for 245 horsepower and 258 pound-feet of torque) to an electric motor integrated into the eight-speed automatic transmission (contributing another 113 hp and 184 lb-ft) for a total combined output of 313 hp and 332 lb-ft. That makes it more powerful by both counts than the six-cylinder X5 xDrive35i (though considerably less so than the V8-powered xDrive50i), giving it a quoted 0-62 time of 6.8 seconds and an electronically limited top speed of 130 mph. But it can travel up to 19 miles on electric power alone, at which top speed is limited to 75 mph. BMW has mounted the 9-kWh lithium-ion battery pack underneath the luggage floor, limiting cargo capacity to between 17.65 and 60.7 cubic feet, depending on how you set up the rear seats. An adaptive suspension keeps it all on an even keel, with power transmitted to all four wheels through a permanent all-wheel-drive system. An M model it is not, but the Bavarian automaker will offer it with an M Sport package. Full details on pricing and availability have yet to be announced, but the X5 xDrive40e is set to hit European dealers in the fall. The BMW X5 xDrive40e The first plug-in hybrid production car from the BMW core brand is a Sports Activity Vehicle. Permanent all-wheel drive and the BMW EfficientDynamics eDrive technology endow the BMW X5 xDrive40e with sensational sportiness and supreme poise on the one hand and outstanding efficiency on the other. With a total system output of 230 kW/313 hp generated by a four-cylinder petrol engine with BMW TwinPower Turbo technology and a synchronous electric motor, the BMW X5 xDrive40e achieves a combined fuel consumption of 3.4 – 3.3 litres per 100 kilometres (83.1 – 85.6 mpg imp) and a combined electricity consumption of 15.4 – 15.3 kWh over the same distance. CO2 emissions come in at 78 – 77 grams per kilometre (figures according to EU test cycle for plug-in hybrid vehicles, may vary depending on the tyre format specified).