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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.

Carlsson turns Mercedes-Benz SLK into 610-HP hill-climb clawer

Carlsson's race-tuned versions of the Mercedes-Benz SLK have been taking checkered flags for years, and we won't be surprised if its SLK 340 hill climber fares any different. Developed by multiple German and Swiss hill climb champion Reto Meisel, the carbon-bodied SLK 340 with lightweight brakes and a closed underbody weighs 1,716 pounds. Propelling that tiny bit of weight is a 3.4-liter V8 from Judd with 610 horsepower, and it rolls on 18-inch wheels shod in Avon tires.
It will debut at the Geneva Motor Show before beginning its racing campaigns in the summer. This one won't just tear up roads in Europe, though - Meisel says he plans on bringing it to the Pikes Peak International Hill Climb. The press release below has more details.

Race recap: 2016 Hungarian Grand Prix was the pits

The Hungarian Grand Prix hasn't seen a race this calculated since 2012, when Lewis Hamilton – driving for McLaren – led from pole position to the checkered flag. We don't expect massive action from the Hungaroring, but Hamilton's first win for Mercedes in 2013, the thrilling wet mess in 2014, and Ferrari's surprising dominance in 2015 made us hope for more on-track commotion this year. Hungary denied us that. Hamilton parked his Mercedes-AMG Petronas in second on the grid but stole the lead through Turn 1 and never looked back. Teammate Nico Rosberg yo-yoed behind him in second place, getting into DRS range on a few occasions but never close enough to pass. Red Bull's Daniel Ricciardo kept the leading duo honest, but the Aussie couldn't put genuine fear into the German team and finished third. This is the third year in a row for Ricciardo on the Hungary podium. The pits provided our few scraps of excitement. During a stretch when Ricciardo managed to close on Rosberg, Mercedes told Hamilton to speed up. When Hamilton said he couldn't go faster, Mercedes said they'd pit second-place Rosberg first instead. Suddenly, Hamilton found the extra pace. Ricciardo pitted in early, hoping that fresh tires and fast laps could allow him to pass one or both Mercedes drivers when they pitted, but once Hamilton hit the throttle the Red Bull couldn't respond. Further down the lineup, Jenson Button came in on Lap 5 so McLaren could fix his brake pedal problem. The radio exchange before the stop included one forbidden instruction to Button, though, so the Englishman had to return to the pits for a drive-through penalty. Renault's Jolyon Palmer beat Force India's Nico Hulkenberg in a straight-up pit stop battle on Lap 40, but threw the good work away on Lap 49 with a spin on track that cost him three places. A pit wall miscommunication meant the Force India pit crew wasn't ready for Sergio Perez when the Mexican arrived for his second stop on Lap 43. And Daniel Kvyat's regrettable run at Toro Rosso continued, first with car issues, then a drive-through penalty for speeding in the pit lane. Sebastian Vettel brought his Ferrari home fourth, sniffing Ricciardo's gearbox at the flag but unable to get around the Red Bull. Max Verstappen enacted a replay of the final stages of the Spanish Grand Prix, finishing fifth by holding Ferrari's Kimi Raikkonen behind for 19 laps.