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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.

2015 Mercedes-AMG C63 S First Drive [w/video]

As I mashed the throttle heading into the back straight of a nearly three-mile-long race track, I couldn't help but center my mind on two ostensibly disparate subjects: physics and pistons. If the heart of an automobile is its engine, the heart of the engine are its rotating bits – the crankshaft, pistons and the block they're nested inside. It seems fitting, then, that the internals of the twin-turbocharged 4.0-liter V8 typify the brand-new 2015 Mercedes-AMG C63 sedan I found myself piloting in Portugal. Whereas the last C-Class AMG availed itself of a brute of an engine, employing 6.2 liters of displacement to make its 451 horsepower the old fashioned way, the latest AMG's V8 engine has been downsized radically. I had the opportunity earlier in the day to actually hold the pistons of the new 4.0 Biturbo V8 in my hands, alongside those of the outgoing 6.2. The difference in size is staggering, the new lumps looking downright picayune in comparison to the latter. These eight seemingly diminutive pistons turn combustion into crankshaft-spinning power inside a block that is smaller, lighter and more compact than I'd have thought possible, considering the prodigious output the engine spits out. I had gone into this assignment expecting to pen an ode to lost love; a sonnet of sorrow bemoaning the switch from massive cylinders to wheezing power adders. But I was wrong. In fact, the report that follows may indeed read a little like a love song, except it will heap praise not on what used to be, but instead on what is now possible. The new heart of AMG more than makes up for its reduction in size by relying on turbochargers and smart engineering to turn just 4.0 liters into 469 horsepower and 479 pound-feet of torque starting at just 1,750 rpm, or as much as 503 ponies and 516 lb-ft in uprated S guise. Foot to the floor, eyes focused on the turn ahead, a hard right-hander named Primeira that requires hard braking and quick reflexes, I had a fleeting moment of clarity: These are some hard-working pistons. A few days on the street and track in and around Faro, Portugal, has convinced me that the new Mercedes-AMG C63 is a better car in any meaningful measurement than it was before. And I'll go one step further. Not only is this the best C-Class AMG ever, it's also my new favorite in the hotly contested segment that includes such knee-benders as the BMW M3 and M4.

2016 Mercedes-AMG GLE63 S Coupe 4Matic brings big power to go with massive name

Mercedes-Benz hopped into the luxury crossover coupe market with both feet with the recently debuted GLE-Class Coupe. While the existence of beauty in this segment is still up for debate, the Merc really gives the BMW X6 a direct competitor. With the newly unveiled 2016 Mercedes-AMG GLE63 S Coupe 4Matic, the engineers from Affalterbach are now also turning their sights on their rivals from BMW's M division. Don't let the name fool you. The GLE63 AMG Coupe eschews the twin-turbo 4.0-liter V8 from the C63 AMG in favor of an even bigger power source. This crossover uses the company's thundering 5.5-liter twin-turbocharged V8 with stop/start that pumps out 577 horsepower and 561 pound-feet of torque – 10 hp and 8 lb-ft more than the X6 M. The deep well of muscle means the sprint to 62 miles per hour takes just 4.2 seconds; faster than you can say the coupe's mile-long official name. The AMG Speedshift Plus 7G-Tronic seven-speed automatic gearbox routes all of that grunt to all four wheels with a 40:60 front/rear split. The styling of this beast gets a special nod from AMG by being the first CUV from the company to get its A-wing grille. Even if the rest of the design can be polarizing, this portion looks fantastic. The airfoil in the bumper is supposed to look like a stylized A, and from some angles, the wing almost appears like its just floating there. Each side of the GLE63 features black wheel arch flares, and around back there's a small lip spoiler on the tailgate. It's complimented by a new rear apron that has air outlets at each corner, integrated tailpipes and a diffuser in the center. Being a Mercedes-AMG, buyers sit in the lap of luxury inside. The seats are covered in Nappa leather with AMG crests on the headrests. The performance brand's moniker can also be found on the three-spoke steering wheel, and the instrument panel even gets covered in black Nappa. Obviously, if this isn't enough for potential buyers, Mercedes has a ton of options on hand. They include performance-oriented items like a sport exhaust system, 22-inch wheels and carbon fiber engine cover, but there're also more opulent choices like the fragrance mister and a high-end Bang & Olufson sound system. Scroll down for all the details on the much more powerful GLE Coupe. The new Mercedes-AMG GLE63 S Coupe 4MATIC Driving performance reinterpreted Affalterbach/Detroit.