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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.

Vision Mercedes-Maybach 6 teases gullwing doors in video

Because these are the times we live in, automakers tease their biggest and best debuts mercilessly before finally dropping the curtain. That's why we're writing about the Vision Mercedes-Maybach 6 Concept again. Here's a new video, posted on Mercedes' Instagram page, showing even more of the hulking two-door coupe. For one, it looks like Mercedes is revisiting gullwing doors. There's a brief snippet of the doors in the open position with a red light – possibly a brake light – bisecting the roof. The video also gives us a couple of good looks at the taillights, which are super-model skinny, just like the lamps up front. Look close at the rear three-quarter cut, and you'll spot a strong chrome strip that accentuates and breaks up those beefy rear haunches. It's hard to tell where they fit in with the chrome strips on the front fenders and hood, so we'll probably need to wait until the big debut to see how it all works out. As we've said twice already, the Vision Mercedes-Maybach 6 debuts on August 18. Stay tuned. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Mercedes C-Class Coupe due to go on sale next December

While we expect to see the coming Mercedes C-Class convertible sometime next year, perhaps at the Paris Motor Show, Auto Motor und Sport reports that the C-Class Coupe will go on sale in December 2015 (probably in Europe first) - it's possible we'll see it debuted at the same time as the cabrio. The German magazine says the two-door will have sharper lines on a body that is four inches longer, almost two inches wider and a fraction of an inch lower than the sedan, dimensional aggrandizement that will be put to good effect on the AMG version coming in 2016. We'll have to wait for information on powertrains, which should hew to the sedan's lineup in addition to whatever else M-B might bring over here, topped off by the 503-horsepower, twin-turbo V8 in the AMG variant. Speaking of which, the 'last-generation' C63 AMG Coupe is still on sale until spring of next year, if you're a fan of the classics. Or you can wait on news of the C-Class four-door coupe, if niches inside of niches are what you're really after.