2012 Mercedes-benz Ml350 4matic,p1 Pkg/keyless/ Navi/lane Tracking/rear View Cam on 2040-cars

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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.

The most or nothing: Mercedes-Maybach S650 Cabriolet pushes the luxury limits

After the introduction of the Mercedes-AMG GT Roadster at the Paris Motor Show this fall, we informed you that Mercedes-Benz has a convertible conundrum, a surplus of drop-tops that seemingly threatens to self-cannibalize within the brand's ever-proliferating lineup. Benz's head of design, Gorden Wagener, who spends much of his time in Southern California, argues it's not a problem: Each convertible, in its ideal construction, would intrinsically vanquish any issues. "The bad is the enemy of the good," he said, not exactly quoting Nietzsche. Now, the three-pointed star brand has upped the top-down ante, with the unveiling this week at the Los Angeles auto show of the Mercedes-Maybach S650 Cabriolet, a vehicle so opulent, it sits in price and position atop the uber-luxury brand's current top-of-the-line offering, the $247,900 Mercedes-AMG S65 Cabriolet. View 24 Photos "Mercedes-AMG is our performance brand so it's all about performance stuff," says Wagener in a one-on-one interview on the roof of a Beverly Hills mansion just before the new car is unveiled. "Of course, Maybach has power, too, but it's the ultimate in luxury. So it's more on that side. And for me in the interior, it's the haute couture of the automobile, so we tried to up that a little more with details. And on the exterior, it's a more superb appearance up front, more chrome, more rich, and of course we tried to up that branding even more. The S-Class is the best car in the world, we consider, I always thought we could raise the Mercedes brand. And it's the same with the S convertible." Why does Mercedes-Benz need a flagship atop its flagship? Because, when climbing the mountain of automotive luxury there is always the customer who, when he or she reaches the pinnacle, wants more. A car brand, especially one with deep pockets and luxurious heritage like Mercedes, can always further gild the automotive lilies, creating a step up for those for whom the brand's motto, The Best or Nothing, is a literal life credo. "It's always our job to make it better," Wagener says. "Each little detail, the wood, the wood under cover of the cabriolet, the leathers. All the super luxury details that make a luxury car into a super luxury car. The key is to make a modern luxury design and not a traditional luxury design. There is definitely a market for traditional luxury, but we always wanted to have Mercedes, Maybach in particular, as a modern luxury car.

Volvo S60 Polestar concept plays in the snow with Mercedes C63 AMG

Chris Harris took to a snowy stretch of tarmac to get a fingertips-on-the-wheel feel of the Volvo S60 Polestar concept. Harris says the turbocharged sedan with 508 horsepower and 424 pound-feet of torque - and a manual transmission - is "a study to see if Volvo can get back into the fast-car market." The Polestar S60 concept, one of which was already purchased for $300,000 by a private buyer, is still making the publicity rounds because even Volvo's Chinese owners realize that, as Harris says, "Volvo sold more cars because it made fast cars" like the old 850 T5 Wagon that stormed the British Touring Car Championship in the 1990s.
For reference, Harris compares the blue wonder to the Mercedes-Benz C63 AMG and its 487 hp and 442 lb-ft. The question is, were Volvo to get the price of a production version of the S60 Polestar to climb way down from its 200,000-pound sticker, could it be worthy competition to the established giants?
You can watch Harris divine the answer via a lot of drifting through the snow and a drag race in the video below.