2002 Mercedes-benz Ml500 Base Sport Utility 4-door 5.0l on 2040-cars

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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 GLS updates Silver Star seven-seater

It can be bewildering, the staggering array of crossovers and SUVs offered by Mercedes-Benz. There's the G, the GL, the GLK and the GLA, not to mention the new GLE and the ML that basically started it all. So you can forgive yourself if you've never heard of the GLS. After all, it doesn't currently exist. But it will soon. In accordance with Benz's new nomenclature, the GLS-Class will be the replacement for the GL – the largest of the Mercedes utility vehicles and the only one with three rows of seats. Since the current GL was only launched about two and a half years ago, the new nameplate won't be attached to an all-new model just yet. But as you can see from these spy shots, it appears that Mercedes is preparing a facelifted version of the existing model to fit into the new (or at least renamed) lineup. The biggest changes discernible from these spy shots is the revised front end, with new headlights, a more upright grille and a reshaped bumper and hood to go along with it. Around back the changes are more subtle, with reshaped tail lamps, bumper and exhaust pipes. Inside we're expecting a cleaner center console with a new 8-inch touchscreen reportedly inspired by the iPhone. We don't know when, exactly, to expect the revised GLS to arrive on the scene, but given the relatively modest nature of the revisions and how close they look to being ready, we wouldn't expect it to be long now. Whether those minor changes will be enough to keep up with the all-new Audi Q7 just announced, however, is another matter entirely.

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.