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Next Mercedes S-Class stretching into this 600 Pullman limo

To the concern of nobody in particular, Mercedes-Benz will not be re-upping its Maybach line of ultra-luxury limousines. No, instead the German automaker will be stretching its already roomy S-Class, to make this upcoming 600 Pullman version of the decked-out beast.
The car in our new gallery of spy shots is sporting beefy B-pillars and a massive set of rear doors that should allow perfectly graceful ingress and egress from what is likely to be a palatial rear space. (In one photo we can even see a long-wheelbase S-Class in line with the new Pullman, handily exhibiting the size of the new variant.) The exterior modifications are otherwise obscured, though we can guess at revised front and rear fascia and lighting elements, based on both end being heavily taped for these test runs.
It's a good bet that the Pullman will make use of M-B's twin-turbocharged V12 engine, though sources indicate that a hybrid version might eventually be in the offing, as well.

VW joins Daimler's protest of new A/C refrigerant as EU deadline for compliance passes

The case of Dupont and Honeywell's refrigerant R-1234yf is doing the exact opposite of keeping things cool. The two chemical companies have spent years and hundreds of millions of dollars developing R-1234yf to replace R-134a, the new refrigerant shown to be 99.7-percent kinder to the environment than the one it is meant to succeed. Part of that development has been years of testing by governments, outside safety agencies and automakers to approve the chemical for use in cars. It passed the protocols necessary for the European Union to declare that new and significantly revised cars from 2013 onward needed to use R-1234yf, and mandated that every car as of 2017 must use it.
Enter Daimler AG. The automaker created a head-on collision test with a B-Class at their Sindelfingen test track that would lead to the pressurized refrigerant being sprayed on the engine. The result in 20 out of 20 test was that the refrigerant burst into flames as soon as it hit the hot engine, while Daimler says that R-134a does not catch fire in the same test. Another unexpected result of the R-1234yf test was the release of hydrogen flouride, a chemical far more deadly to humans than hydrogen cyanide, emitted in such amounts that it that turned the windshield white as it began to eat into the glass.
Said a Daimler engineer in a Reuters piece, "It was scarcely believable. The most complicated lab tests conducted using the most sensitive measuring instruments around found nothing and all we do is drive a car around a couple of times, open a tiny hole in the refrigerant line and the next thing you know the car is on fire." So Daimler said it wouldn't use the refrigerant, and it recalled the cars it had already shipped with R-1234yf.

Mercedes-Benz G500 4x4 is a 6x6-2 [w/video]

In terms of truly badass off-roaders, it doesn't get much cooler than the Mercedes-Benz G63 AMG 6x6. After all, the thing has three axles powering six wheels, not to mention an AMG-tuned V8 that makes the truck pretty much unstoppable. Call it an exercise in excess, if you will, but we call it super cool. And now, at the 2015 Geneva Motor Show, Mercedes is showing off a slightly less outrageous version of its insane off-roader, called the G500 4x42. And by "slightly less outrageous," we pretty much mean, "with one fewer axle." Sure, there have been some other changes, too – namely under the hood, where the AMG's twin-turbo 5.5-liter V8 has been removed in favor of a new, twin-turbo 4.0-liter V8, good for 422 horsepower and 450 pound-feet of torque. Off road, this thing should be a freaking beast. It can ford depths up to 39 inches, the approach angle is 53 degrees, departure is 54, and the breakover is 47. Talk about all-terrain. Plus, it looks freaking cool, with 22-inch wheels on 325/55-series tires (which can be swapped for a set of 18-inch wheels on 37-inch beadlock tires). We even love the lime green paint it wore upon debut, and are kind of sad the Geneva showcar is painted in this less-awesome silver. Either way, it's certainly a creation to behold. Check it out. Near-series show car G 500 4x42: The G-Class Squared Stuttgart, Feb 21, 2015 -- Only a G-Class can be better than a G-Class. This is the credo followed by the developers with the Mercedes-Benz G 63 AMG 6x6, and they are now stepping up a gear with the G 500 4x42. The basic recipe for this overcomer of everything is simple: take the superior all-wheel-drive powertrain including portal axles from the 6x6 – take away one axle – and blend it all with a newly-developed variable chassis and the series-production G-Class body. A large pinch of V8 power with 310 kW (422 hp), a set of 22-inch 325/55 R 22-sized wheels, carbon-fibre body parts and then just gourmet ingredients from the seductive designo Exclusive range for the interior – and the 5-star menu for all off-road enthusiasts is ready. A new addition to the extreme G-Class model family: the G 63 AMG 6x6 has a model brother in the form of the G 500 4x42. The near-series show car is a new highlight in the superlative-rich history of the G-Class and blends all the advantages of the model series.