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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 Unimog poised for Canadian return

The Mercedes-Benz Unimog, the super-duper heavy-duty off-road workhorse vehicle that the German automaker has been making for more than 60 years, may soon be sold in Canada once again after a hiatus. Regulators had taken issue with both their emissions (super torquey diesel engines don't tend to run real clean) and the fact that some folks would take them out on city streets and even highways (these beasts have a top speed of about 25 miles per hour). Now, regulatory officials are considering allowing the Unimog to be sold in Canada again, albeit under strictly off-road driving regulations, Canada's Driving says. In fact, the diesel trucks apparently run a lot cleaner than they used to, while the torque levels remain off the charts. Naturally, some folks are clamoring for them because of their ability to run on just about any terrain. Hans Mross of Vancouver-based Mross Import Service Ltd., which previously imported the Unimog to Canada, told Autoblog he was "99 percent sure" the Unimog would be brought back to Canada. We'd last reported on the Unimog in April 2013, when Mercedes-Benz said it would start selling 10 different versions of the truck. Related Video: Featured Gallery Mercedes-Benz Unimog View 33 Photos News Source: Driving Mercedes-Benz Truck Diesel Vehicles unimog

Mercedes 'could' do BMW i rival. But it won't

It's a safe bet that if one automaker does something, its big rival won't be far behind with a response. This is true no matter the country in question. So with BMW's i sub brand enjoying a firm, green standing, it seems like only a matter of time before Mercedes-Benz answers. Or not. Speaking to Autocar, the company's head of sales and marketing, Ola Kallenius, said Mercedes could absolutely conjure up an ultra-efficient sub-brand filled with unique, eco-friendly models to compete with the i3 and i8. Or, you know, it could just apply a fuel-sipping philosophy across the company's range and crush i with a far wider array of models and powertrains. "We could choose for the purpose-made electric vehicles to create some sort of sub-brand but, right now, Mercedes is focused on investing tremendous resources into the path towards zero emissions," Kallenius told Autocar. "It's something that will affect the whole portfolio." And that's not all. "What we're going to do in terms of the road to zero emissions is invest heavily in alternative drivelines and electrification," Kallenius said. "That's a very wide strategy, but it means that by the end of next year we will have 10 plug-in hybrid models, which, I think, is the widest portfolio of any luxury manufacturer." Zing. Kallenius went on to say that on top of the PHVs, MB will sell three all-electric models – two Smart-badged vehicles and the not-for-US B-Class – while its next fuel-cell model, a GLC-based CUV, will hit dealers at the end of 2017. Related Video: