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Cadillac ATS-V and Mercedes-AMG C63 S pitted Head to Head

Our favorite (and only) Autoblog-alum-turned-Motor Trend staffer is back with another Head to Head video, this time pitting the Cadillac ATS-V with the Mercedes-AMG C63 S. This performance machine shootout is ostensibly a way to figure out which of these new super sedans will earn the right to go toe-to-toe with the undisputed champion of its segment, the BMW M3. In reality, it's just a really good excuse to put three of the hottest sedans on the market on video at the same time... and there's certainly nothing wrong with that. Jonny Lieberman spends time in each of the two new challengers on the road, picking apart their powertrains, chassis and driving dynamics on the kinds of twisty roads drivers of these cars will relish. Then, he hands the keys off to Randy Pobst, who sort of acts as an unmasked version of a certain tame racing driver, except that he talks and has a personality. 0-60 and quarter-mile times are equated, braking performance is measured and scores are tallied before the two sport sedans end up at Willow Springs raceway. Interestingly enough, the car that proves (just slightly) faster at the race track isn't the car that wins the comparison. Curious? We're not going to spoil it for you. Check out the video, above. Then, for more action of these two machines, check out the videos just below. Related Video: News Source: Motor Trend Channel via YouTube BMW Cadillac Mercedes-Benz Luxury Performance Videos Sedan motor trend cadillac ats-v mercedes-amg c63

Mercedes G 500 4x4 is mighty mean and bright lime green

The Mercedes-Benz G500 4x42, finally ready to meet the crowds at the Geneva Motor Show, might just be the best factory-prepped expedition off-roader on the market, should Mercedes choose to build it. The short story is that some well-heeled admirers of the G63 AMG 6x6 said, "It's nice, but can you take it down a notch?" And by "notch" they meant "an axle." So the G500 4x42 gets just two portal axles instead of three, and a slew of other features. The 4x4 squared offers up a standard G-wagen body, but instead of the 5.5-liter twin-turbo V8 from the G63, there's a new 4.0-liter twin-turbo V8 with 422 horsepower and 450 pound-feet of torque. Compared to the standard G500, the track is 11.8 inches wider, the street-cred rims being 22-inchers on 325/55 R-series tires. When it's time to get dirty, they can be swapped for an optional set of 18-inch wheels with 37-inch beadlock tires. With that setup and the same wheelbase as the G500 LWB, ground clearance and fording depth are more than doubled to 17.7 inches and 39 inches respectively, the angle of approach goes from 36 degrees to 52 degrees and the angle of departure leaps from 27 degrees to 54 degrees. Breakover angle is bumped from 21 degrees to 47 degrees, a two-piece stainless steel undertray protecting the sensitive bits when you push it. The only parts that get a raised eyebrow are the carbon fiber wheel arches and bumpers, which might behave badly when they meet an immovable granite object. To escape the sensation of driving the Taj Mahal in urban environments, there's a twin spring-and-damper setup at each wheel. One of the spring-damper combos is electronically controlled and adjustable, and when called into action via the Comfort or Sport mode, takes control of wheel action; even when passive, it will kick in to automatically to stiffen the body if it detects evasive maneuvers. On top of all that, to remind you that you're in a Mercedes the interior is fitted out with Designo leather trim and diamond-quilted microfiber. Mercedes is going to gauge its Geneva reception before deciding to build it, a hurdle we're sure will be overcome. Car and Driver drove it and verified it's the real deal, with pricing - if it's built - speculated to land between the G63 AMG and G65 AMG. The press release below has all the details. Related Video: Near-series show car G 500 4x42: The G-Class Squared Stuttgart, Feb 21, 2015 -- Only a G-Class can be better than a G-Class.

2015 Australian Grand Prix all about grooves and trenches [spoilers]

We can't remember the last time 90 percent of the action in Formula One had nothing to do with cars setting timed laps. Yet that's was the situation at the Australian Grand Prix, continuing the antics from a scarcely believable off-season with blow-ups, driver and team absences, a lawsuit, and a clear need for some teams to get down and give us 50 pit stops. Nothing much has changed from a regulation standpoint, and at the front of the field nothing has changed at all. Lewis Hamilton in the Mercedes-AMG Petronas claimed the first position on the grid like someone put a sign on it that read, "Reserved for Mr. Hamilton;" teammate Nico Rosberg was 0.6 behind in second, Felipe Massa in the Williams was 1.4 seconds back in third. Sebastian Vettel proved that Ferrari didn't do another Groundhog Day routine this off-season, slotting into fourth. His teammate Kimi Raikkonen was not even four-hundredths of a second behind, ahead of Valtteri Bottas in the second Williams, Daniel Ricciardo in the first Infiniti Red Bull Racing, and rookie Carlos Sainz, Jr. in the first Toro Rosso. Lotus, now powered by Mercedes, got both cars into the top ten with Romain Grosjean in ninth, Pastor Maldonado in the final spot. However, even though the regulations are almost all carryover, in actual fact, everything has changed this year. Mercedes is even faster. Renault is even worse. Ferrari and Lotus are a lot better. Toro Rosso is looking like anything but a junior team. And McLaren is – well, let's not even get into that yet. Furthermore, this weekend was shambles: 15 cars started the race, the smallest naturally-occurring grid since 1963. Manor couldn't get its cars ready before qualifying. Bottas had to pull out after qualifying when he tore a disc in his back and couldn't pass the medical clearance tests. The gearbox in Daniil Kvyat's Red Bull gave out on the lap from the pit to the grid, and to give misery some company, the Honda in Kevin Magnussen's McLaren blew up on the same lap. When the lights went out, Hamilton ran away and was more than a second ahead of his teammate at the end of Lap 1. The advantage disappeared, though, because behind him, at the first corner, we got our first pile-up. As Raikkonen drove around the outside of Vettel at the right-hand Turn 1 it looked like Vettel, going over the kerbing, hopped to his left and bounced into Raikkonen.