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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.

Mercedes-Benz S-Class Cabriolet completes the luxury trinity

In its continuing bid to simply eat the lunch of the Bentley Continental GT, Mercedes-Benz has followed up on the S-Class sedan and coupe with a new S-Class Cabriolet. Aristocrats, take notice. Below the beltline, all is familiar. That means the same stylish sheetmetal, from the chiseled front fascia to the strong character lines to the pert rear end. Expect the cabin's accommodations to mirror the hardtop model. But the third member of the S-Class family differs above the beltline, where we see a sumptuous canvas roof. The three-layered top is, unsurprisingly, quite advanced. It uses a three-layer, acoustically optimized design that promises a quiet ride. The top can be dropped or raised in under 20 seconds and at speeds of 37 miles per hour. Finally, the addition of a canvas cover doesn't do much to the S-Class' aerodynamics, as the cabriolet still returns an impressive 0.29, which compares favorably with the 0.27 of the four-door model (the coupe's CoD isn't available). Opting for the S-Class Cabriolet will entitle you to some additional standard equipment, including Mercedes' AirScarf neck heater. The droptop will also pioneer the German brand's new Thermotronic climate feature, which takes complete control of the HVAC system and makes adjustments based on the findings of 12 sensors and 18 actuators. The sensors include those for interior and exterior temperature, solar radiation, air quality, and dew point, among others. Yes, your S-Class will have a sensor for the dewpoint. Also new to the S-Class Cabriolet – not to mention the S-Class line as a whole – is a 9G-Tronic nine-speed automatic transmission, which is already featured on the SLK-Class and the new GLC-Class. The new 9AT will be limited to the S550, while the new S63 Cabriolet will use the coupe's seven-speed AMG Speedshift transmission. Both engines, meanwhile, mirror their coupe counterparts, with 449 horsepower and 516 pound-feet of torque for the S550 and 577 hp and 664 lb-ft of torque on the AMG model, allowing the latter to hit 60 mph in just 3.9 seconds and reach a limited top speed of 186 mph. Both the S550 cabriolet and its Mercedes-AMG counterpart will make their global debut at the 2015 Frankfurt Motor Show, later this month. Read on for the full press release from Mercedes-Benz. The new Mercedes-Benz S-Class Cabriolet Open-top luxury Stuttgart. The new S-Class Cabriolet is the fourth variant of the current S-Class family in the U.S.

YouTube viewers prefer BMW

BMW owners sometimes get a bad rap as being snobbish, rude drivers, but according to a new study by the online marketing company ZEFR, Bimmer aficionados also have a close relationship with the brand's vehicles. With well over 4 billion YouTube views, the German automaker is the industry's king of the road online. Making the popularity even sweeter for marketers, 95 percent of those clicks are for fan videos, which represents loads of free advertising. BMW isn't the only automaker with such an extensive following. Honda comes in a close second with around 4 billion views, and Mercedes-Benz is just a little behind it. Among all brands, it's the norm for fan-made videos rather than the official ones to get the lion's share of the clicks, generally 95 percent or more. "YouTube has become a treasure trove for connecting with the right people for automakers," Dave Rosner, ZEFR marketing boss, said to Automotive News. Beyond just a popularity contest among brands, automotive videos are big business on YouTube, according to ZEFR's research. Enthusiasts are leading the way, too. Racing is by far the most-watched category with 895,000 clips generating a staggering 8.2 billion views. Classic cars are also a very hot topic with 305,000 videos getting 1.6 billion clicks. Surprisingly, when it comes to watching auto videos, sedans are most popular on YouTube with over 9 billion views, according to Automotive News. Meanwhile, SUVs, performance vehicles, and pickups were each around 3 billion or less. You can check out the full study for yourself, as a PDF, here. Related Video: