2022 Mercedes-benz Sl-class Sl 55 Amg 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.

F1 title fight gets closer | 2016 US Grand Prix recap

We ran into an old friend at the US Grand Prix: an on-form Lewis Hamilton. Reliability and proper clutch actuation helped the Mercedes-AMG Petronas driver resurrect the kind of performance we haven't seen since July at the German Grand Prix. After demolishing the previous qualifying record around the Circuit of the Americas, he put the field in his mirrors as soon as the lights went out, was never bothered by anyone behind, and crossed the finish line 4.5 seconds ahead of teammate Nico Rosberg. The drive was exactly what Hamilton needed to keep his molecule-thin Championship hopes alive. Rosberg, however, did exactly what he needed to do as well by finishing second. The German had a sketchier path to the checkered flag than Hamilton, getting pushed back to the third at the start by Red Bull's Daniel Ricciardo. Worse, Ricciardo appeared to have the pace to keep Hamilton honest ahead and hold Rosberg behind. Red Bull and Mercedes matched one another's pit stops, and it was clear the German would need more help to pass the Aussie. Rosberg didn't have to make his own luck, Ricciardo's teammate Max Verstappen made the luck for him. Ricciardo pitted on Lap 26, ceding second position on track to Rosberg. On Lap 30, Verstappen's gearbox failed while headed down the back straight. The Dutch teenager said the team told him to try to get the car back to the pits, so he dawdled through a few corners before following more team orders to pull over and park. Verstappen's parking spot and bad gearbox meant marshals couldn't push the car off the track, they needed to use a crane. That brought out a Virtual Safety Car, slowing the whole race down and allowing Rosberg to run a longer stint while losing less time on old tires. When the German came in for new tires on Lap 31 he emerged ahead of Ricciardo, and they ran that way to the end of the race, much to Ricciardo's disappointment. Sebastian Vettel claimed fourth for Ferrari, a placing perhaps due only to Verstappen and Kimi Raikkonen retiring from the race. An otherwise anonymous weekend for the scuderia called attention to itself on race day when Raikkonen had to call it a day after a botched pit stop, and Vettel couldn't make any impression on the teams ahead. Fernando Alonso rode home to a brilliant fifth for McLaren. During the first stint while rummaging around outside the top ten, the Spaniard complained about his lack of pace. By Lap 15 Alonso was tenth, on Lap 34 he was eighth.

Range Rover versus Mercedes-Benz: Which makes a more appealing SUV?

From time to time — truth be told, all the time — the Autoblog staff enjoys a good debate on the merits and demerits of the cars and trucks we drive each week. This week, we spent some time in a brand-new Land Rover Range Rover Supercharged SUV, a model some of us think sits at the pinnacle of the luxury utility vehicle segment. Others disagree. The following is a real-life online debate that took place over the course of a few hours. Have a read, and feel free to take sides. There's a poll at the end so you can make your voice heard. Consumer Editor Jeremy Korzeniewski: Strange as it may sound, Jeremy Clarkson and I have a few things in common, most obvious of which is that we share a given name. But we also both love cars so much that we decided to turn our automotive passion into a career — with varying degrees of success, of course — and we both have come to realize over time that there's no point in trying to topple the Land Rover Range Rover as the world's best luxury off-road utility vehicle. Thing is, this universal truth isn't quite as universally shared as I think it should be. In fact, my esteemed colleague Alex Kierstein believes that Mercedes-Benz makes the most desirable four-wheel-drive off-road vehicles. He's clearly wrong, but I feel obligated to let him explain his choice, though it won't go without a rebuttal. Senior Editor Alex Kierstein: That's correct, and so am I in this regard. I'm sorry, Jeremy, but it's an irrefutable fact that Mercedes-Benz is doing the best interiors in the business now. And the interior is where you're going to spend most of your time, at least when the thing's running. The Range Rover's interior simply isn't as special, and frankly it'll be in the shop enough that you won't enjoy it. Now, stepping into pretty much any contemporary Mercedes sedan interior is a "wow" moment. They seem special — posh, exclusive, luxurious. The SUVs, all older vehicles coming due for total redesigns at some point in the future, are lagging a bit, but it's still a premium and upscale experience. Especially since performance is almost academic at this point. Anything in this class is going to be powerful, almost absurdly so. So why not go for the one that makes you feel like royalty, rather than your mechanic? JK: I just want to point out that it was you who brought reliability into this discussion.