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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 takes VW Westfalia Camper idea upscale with new Marco Polo

Earlier this year, Mercedes-Benz revealed the new V-Class. Slotting in below the popular Sprinter, the new V-Class replaced both the Viano and Vito upon its debut at the Geneva Motor Show. But Mercedes isn't quite done with it just yet. At the upcoming Caravan Salon in Düsseldorf, Germany, Mercedes will reveal the Marco Polo - a versatile, stylish and decidedly contemporary take on the classic camper van.
Named after the famous Italian explorer, the Marco Polo was converted by Westfalia, an outfit which you might more closely associate with classic VW camper vans but which Daimler absorbed over a decade ago. Offering, according to the press release below, "a maximum of opportunities to be independent, free and spontaneous," the Marco Polo sleeps four thanks to the rear bench that electrically folds flat into a bed and the second berth under the pop-top. The flexible interior is decked out like you'd expect a modern Mercedes to be, with ambient LED lighting as well as wood, metal and piano black trim.
It's got an onboard kitchenette with two gas burners, a sink and fridge with a 10 gallons of fresh water and an even bigger waste tank. All that gear is shlepped around by a choice of four-cylinder turbodiesel engines ranging in output from 136 to 190 horsepower. The relatively compact form boasts a turning circle similar to a full-size sedan and a height designed to fit into most garages and car washes. All of which just might make us reconsider the appeal of traveling by camper van.

Test drive the Mercedes SLS AMG Electric Drive with Chris Harris

It's hard to not like the Mercedes-Benz SLS AMG GT. The all-aluminum coupe is fitted with a wonderful naturally aspirated 6.2-liter V8 delivering 583 horsepower and 479 pound-feet of torque. Not only does the burly combustion engine launch the two-seater to 60 miles per hour in less than four seconds, but it does so with one of the world's greatest exhaust soundtracks as it roars, burbles and cackles down the road.
But what happens when Mercedes-Benz takes away the V8 and its accompanying fire-burning song? Stripped of one of its most appealing assets, does the SLS lose its soul?
Chris Harris recently had the opportunity to take the Mercedes-Benz SLS AMG Electric Drive for a track spin in Europe. Sans gasoline, but with four electric motors providing a combined 740 horsepower (737 pound-feet of torque), all-electric all-wheel drive coupe uses sophisticated torque vectoring and a multi-mode operating system to put oversteer - drifting! - back into the equation. Fun? You bet. See for yourself, below.