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Mercedes-AMG not making more Black Series models... for now

There was a time when AMG only made one version of any given vehicle, but those times are long behind us. These days it's cranking out entry-level AMG Sport models, the main AMG line and the more potent S-models. But what about the Black Series? According to Autocar, which spoke with Mercedes-AMG boss Tobias Moers at the Geneva Motor Show last week, the Black Series is still in the cards... just not for the short term. Moers said AMG is currently focused more on "making the cars more sophisticated, more precise" than about making headline-grabbing horsepower and torque figures. "The Black Series name... will be necessary in the future, but for now the base cars are so good. The Black Series must be at the top of the hill, but I don't know when or on what model yet." The nearest possible candidate could be the more hardcore version of the Mercedes-AMG GT that's in the works to take on the likes of the Porsche 911 GT3, but Moers didn't say whether that model would warrant reviving the Black Series label. AMG previously applied the Black Series designation to extreme high-performance versions of the SLK, SL, SLS, CLK and C-Class coupe, carrying upgraded engines, suspension, rolling stock, brakes and aerodynamics to make them more track-focused. Related Video:

Aston Martin Vantage vs. Mercedes-AMG GT C Review | Translating German into English

GROssBRITANNIEN — No car matches the new Aston Martin Vantage as closely as the Mercedes-AMG GT, the two sharing both their 4.0-liter twin-turbocharged V8 and electrical architecture while competing for the same market niche. So, of the many challenges Aston Martin faced when developing it, ensuring that the Vantage had a unique identity must have weighed more heavily than any other. The added spice to this confrontation is the GT's status as halo model for AMG. Meanwhile, Aston Martin's brand identity, built on the sharp-suited machismo embodied by a certain big-screen spy, is a make-or-break issue for the company. The identity problem has fascinated me since the AMG deal was first announce in 2013. So exploring the Vantage on British roads with the GT literally filling the mirrors is a big deal. Now, finally, we have directly competing products with which to explore the theory. And there's much to like in both, not least of which is that common powerhouse of an engine. While they don't share a platform, both use the classic front-engine, rear-drive, transaxle layout, with traditional driving manners to match. Some quick number-crunching as an appetizer: The AMG GT C you see here has the dry-sumped M178 derivative of the V8, with 550 horsepower and 501 pound-feet of torque, driving the rear wheels through a transaxle-mounted, seven-speed dual-clutch transmission and fully active electronic locking differential. It's 179 inches long, weighs 3,748 pounds and will clear 0-60 mph in 3.6 seconds en route to 197 mph. The Vantage has the wet-sumped M177 version of the same engine, as featured in countless AMGs and shared with the DB11 V8. It makes 503 hp, 505 lb-ft and drives the rear wheels through a transaxle-mounted, eight-speed automatic gearbox and fully active electronic locking differential. Sounding familiar? It's comparable in overall length but a couple of inches longer in wheelbase, and weighs pretty much the same as the GT C, give or take a few pounds. It hits 60 in 3.5 seconds and tops out at 195 mph. Both have adaptive dampers and a variety of driver modes, both are built from aluminum and both are at the sportier end of the GT spectrum. The two U.K.-market cars you see here cost just more than $180,000 with options. Pretty darned close, then. Numbers are one thing.

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.