1988 Mercedes Benz 420 Sel 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-Benz GLA Concept gets mobbed in China

If the reception it received at the Shanghai Motor Show is any judge of marketplace acceptance, Mercedes-Benz has a hit on its hands in the form of the GLA Concept. And we can understand why - we're quickly becoming fans of Mercedes' recent styling language, as defined by new models like the CLA and this GLA Concept.
The big news on the exterior front are the headlamp clusters, which have frickin' laser beams attached to their foreheads embedded inside that are capable of projecting videos and images on a screen. Plus, a pair of video cameras are mounted on the roof that can be used to capture driving excitement or removed and taken with you. How cool is that? We just hope they have a substantial locking mechanism to prevent would-be thievery...
If the exterior is mostly ready for production, with a few of the more outlandish elements moved to the trash bin - like, for instance, laser-beam headlamps and removable action cams - the interior is a true custom job that screams concept loud and clear. There are all kinds of jewel-like finishes inside, along with transparent surfaces showing what looks like metal latticework underneath and some awfully thick looking leather with massive exterior stitching done by hand similar to what you'd find on a baseball glove.

Petrolicious shows Mercedes 280SL as architecture in motion

While still an absolute beauty today, the design of the pagoda-roof W113 Mercedes-Benz SL was revolutionary when it debuted. Moving away from the soft curves of the previous SL models, the all-new generation brought an upright, angular shape that was as much architectural as automotive. In the latest video from Petrolicious, owner and architect Daniel Monti expounds on the inspiration that he gets from his 1969 280SL's fantastic styling. The roof is the most famous design feature of this generation of SL. Look at the top from the front or back, and you can see a gentle, downward arc that evokes the look of a pagoda. That one styling element is also a fabulous counterpoint to a vehicle that is largely more angular than curvaceous. Petrolicious wonderfully illustrates how some of the SL's form-follows-function design aesthetic can be found in the architect's work in this video's heaping helping of mid-century modern goodness.