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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.

2021 Mercedes-Maybach GLS 600 is business class without the jet lag

Mercedes-AMG demonstrated how sporty a mammoth SUV can be by unveiling the 2021 GLS 63 S at the 2019 Los Angeles Auto Show. Across the Pacific, at the Guangzhou auto show in China, Mercedes-Maybach revealed another GLS variant that puts an unabashed focus on comfort. The 2021 GLS 600 ends years of rumors by finally taking Maybach into the SUV segment. (If you don't count the limited-edition G 650 Landaulet). It's not a standalone model developed from the ground up, and it's in no way related to the electric Vision Mercedes-Maybach Ultimate Luxury concept introduced in 2018. It's a second-generation GLS dressed up in a Hugo Boss suit. Stylists spruced up the front end with Maybach's chromed waterfall grille and mesh inserts in the lower part of the bumper. An abundance of chrome trim (including big slabs of it in on the B-pillars) and Maybach emblems on the D-pillars further set the SUV apart from its non-Maybach-badged sibling. Buyers can order a two-tone paint job at an extra cost. 6.8-foot-long running boards automatically extend from under the body about a second after one of the passengers opens a door. Designers took advantage of the cavernous interior to replace the second- and third-row seats with a pair of business class-like chairs that offer heated, ventilated, massaging and reclining functions. Maybach developed the GLS with chauffeur-driven buyers in mind, so the passengers traveling in the back benefit from their own infotainment system with wireless headphones, folding tablets, wireless device chargers, plus heated and cooled cupholders. Alternatively, buyers can order the GLS as a five-seater with a three-person rear bench. The GLS 600 receives the twin-turbocharged, 4.0-liter V8 engine that's omnipresent in the Mercedes range. It delivers 550 horsepower from 6,000 to 6,500 rpm and 538 pound-feet of torque between 2,500 and 5,000 rpm in this application, and it spins the four wheels via a nine-speed automatic transmission and 4Matic all-wheel drive. Mercedes pegs its zero-to-60-mph time at 4.8 seconds. The standard 48-volt mild hybrid system briefly gives the GLS 600 an additional 21 horsepower and 184 pound-feet of torque. It also sends the kinetic energy it recuperates to the battery pack while braking or coasting, and powers a technology named E-Active Body Control which scans the road ahead and adjusts the suspension as needed if it detects a pothole, a bump or another obstacle.

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.