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Editors' Choice: Top Five 2015 Frankfurt Motor Show Debuts

Consider the 2015-16 auto show season officially kicked off. The Frankfurt Motor Show offered a great look at the newest crop of production cars and conceptual machines, and brought some old favorites back into the spotlight for a closer look. (The Alfa Romeo Giulia, for example, debuted in June, but this was the first time most of us saw it.) Now that the dust has settled and we're all on flights back to the US, our editors cast their votes for their personal favorites from the Frankfurt show. These are the cars we truly loved seeing the most. But unlike other shows, there was no one runaway winner – all of the Top Five received positive praise from our team. We won't spoil the results, though. Scroll down to see what we liked most from this year's Frankfurt expo. 5th Place – MERCEDES-BENZ IAA CONCEPT View 12 Photos MIKE AUSTIN: The clean lines on this concept have me excited for a more elegant beauty to future Mercedes-Benz vehicles. Next to the Concept IAA, the lovely S-Class Coupe looks like an overstyled barge. DAVID GLUCKMAN: Yeah, the extendable rear is neat and all, but I'm more interested in the front-end styling of this one. It looks like the Tron version of a 300SL, in a good way. I'm hopeful it portends the future of Mercedes design. STEVEN EWING: I was super impressed when Mercedes said that, with the rear end extended, this concept has a drag coefficient of just 0.19. That's crazy aerodynamic. I'm not head-over-heels about the styling, but I think the lessons learned from this concept are really important, and will play a huge role in the future of Mercedes' products. 4th Place – ALFA ROMEO GIULIA View 15 Photos SEYTH MIERSMA: I can hardly express how in love with this car I am. The styling feels creative, modern, and evocative, without going over the top. The proposed performance is spectacular. And the Alfa badge speaks to a legacy of romantic motoring. DAVID GLUCKMAN: Pretty Italian car makes big promises and will probably deliver on about three quarters of them. I think that will still be enough for me. JEREMY KORZENIEWSKI: I'm really intrigued by the Giulia. It looks great, sounds awesome, and I'm expecting it to have a load more character than its German rivals. I hope I'm not disappointed. 3rd Place – JAGUAR F-PACE View 15 Photos GREG MIGLIORE: It's the first SUV for Jaguar, and I think they nailed the design, capability, and electronics. It's the right car at the right time.

Mercedes-Benz working on S-Class EV in accelerated green car lineup?

With Mercedes-Benz bringing out coupe and plug-in hybrid versions of its S-Class sedan, the German automaker just may follow through with a battery-electric variant as well. That's what the company's Uwe Ernstberger told the folks at Top Gear during the Geneva Motor Show. And while he noted the company still needs to work in a larger-than-usual battery pack and was less than specific with details, he did envision an all-electric S-Class "in the future." Of course, rumors started bubbling about an EV S-Class as far back as 2011, so we'll see. Christian Bokich, department manager for product and technology communications for Mercedes-Benz USA, would not confirm anything about an electric S-Class, but he did give AutoblogGreen an official rundown of MB's upcoming green cars in the US, starting with the launch of the all-electric B-Class ED in July of this year in the ZEV states (launch details for other states are TBA, he said). An S-Class plug-in hybrid is coming in the first half of 2015, followed by a C-Class PHEV closer towards the end of that year in the USA. There is also a C-Class four-cylinder BlueTEC coming at some point in 2016. Until we get more concrete information about the possible S-Class EV, let's review what we know about the PHEV. Last September, Mercedes-Benz started showing off the plug-in hybrid S-Class, saying that it could go as far as 19 miles on electric power alone and had a preliminary fuel efficiency rating of more than 78 miles per gallon, using the more lenient European driving cycle. Earlier this week, Mercedes showed off its S-Class Coupe. That model's US version will have a twin-turbocharged V8 that kicks in 449 horsepower, a few more than the presumptive S-Class EV will have. Ernstberger also said Mercedes would join the ranks of automakers offering autonomous driving systems and mentioned the S-Class as being at the "top of the movement." He held his tongue when asked about the possibility of an S-Class cabriolet.

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.