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Mercedes introduces the details of the C450 AMG 4Matic

We saw the AMG Sport models joining the C-Class line in Detroit, but Mercedes has waited until the press launch of the Mercedes-AMG C63 to give us the details. In case you've forgotten about how this new puzzle piece fits, there's Mercedes-Benz, there's Mercedes-AMG, then there's the Mercedes-Benz AMG Sport line slotted in between for those who want sporty luxury but not too much of either. This is the second variant in that line-up, and also the second to get V6 power, following the GLE450 AMG Coupe. In the case of the C450 AMG 4Matic, that means a twin-turbo six-cylinder with 367 horsepower and 383 pound-feet of torque, an increase of 38 hp and 29 lb-ft over the C400 4Matic on which it's based. It goes much closer to proper AMG territory with its looks and features, with that sharp, chrome-trimmed lip in front, the oblong lower intakes, lightweight wheels, and a "special AMG badge" on the front fenders. In back, the sedan gets a spoiler on the trunk, the wagon gets a roof spoiler. There's a suspension highly derivative of that on the C63 AMG, with three-stage dampers. So too the five drive modes laid out like on traditional AMGs, the 7G-Tronic automatic transmission, the ESP with Curve Dynamic Assist, and it will even sound close to an Affalterbach special thanks to a sports exhaust. Cabin occupants can play the real deal with sport seats and a flat-bottomed wheel with red cross-stitching. We don't have a price yet, but there will probably be plenty of room between the price of the AMG C63 and the $48,950 C400 4Matic to make buyers happy. The press release below has all the info. Related Video: The new C-Class models from Mercedes-AMG: Mercedes-AMG C 63 and Mercedes-Benz C 450 AMG 4MATIC Mercedes-Benz C 450 AMG 4MATIC: Second AMG sports model with V6 power Driving Performance – the AMG brand claim and typical character traits can now be experienced by an even broader target group. The new C 450 AMG 4MATIC expands the product range of the sports car and performance brand within Mercedes-Benz with another new AMG sports model. As an attractive entry into the world of AMG, the C 450 AMG 4MATIC combines a 270 kW (367 hp) 3.0-litre V6 biturbo engine with a permanent Performance all-wheel-drive system and sophisticated suspension technology adopted from the Mercedes-AMG C 63. This all results in fascinating driving performance and the hallmark emotional expressiveness of the brand.

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.

Race Recap: 2015 Canadian F1 Grand Prix is better behind the front

As of Saturday afternoon in Montreal, Canada, it was all about the number four. Lewis Hamilton put his Mercedes-AMG Petronas on pole position for the fourth time at the Circuit Gilles Villeneuve, and now his tally of pole positions matches his race number: 44. Nico Rosberg lines up beside him, which is the fourth time that particular one-two combo has occurred this season. Ferrari spent three engine development tokens to try and close the gap to Mercedes, Kimi Raikkonen making the most of it with third position on the gird. His teammate Sebastian Vettel got the worst of it, however, when the MGU-K unit failed during Q1, leaving him 160 horsepower down and out at the first hurdle. Valtteri Bottas put a revitalized Williams on the grid at fourth, ahead of a Lotus lockout of the third row with Romain Grosjean leading the way in fifth, Pastor Maldonado just beside. Nico Hulkenberg got the first Sahara Force India into seventh – the team is still waiting on the upgraded B car that should be available for Austria – ahead of Daniil Kvyat in the first Infiniti Red Bull Racing and a "pissed off" Daniel Ricciardo in the second Red Bull. Sergio Perez made it two Force Indias in the top ten, a welcome result from a team performing below expectations of late. When the lights went out, at the very front it was much ado about not that much at all. Hamilton got away clean and stabbed across the track to close the door for Rosberg, giving Raikkonen a chance to take the inside line into Turn 1 in an attempt to clear Rosberg for second place. That didn't happen, leaving the two Mercedes' to run in grid position for the entire race. It wasn't boring – Rosberg stayed close, rubber-banding the time gap to the leader from a little more than one second to just under four seconds, and Montreal is famous for race-rearranging safety cars and on-track incidents. But none of those occurred, so Hamilton crossed the line 2.285 seconds ahead of Rosberg after 70 laps to earn his fourth victory in Canada and the first-ever victory for the Brackley, UK-based Mercedes team. Valtteri Bottas drove his Williams to third position, the first podium place for the team this year and a welcome salve to heal the team's wounds from a poor showing in Monaco. That placing came courtesy of being in the right place at the right time, which was not far behind Raikkonen when the Ferrari driver spun at the hairpin on Lap 28 after his first pit stop.