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2015 Mercedes-AMG C63 S First Drive [w/video]

As I mashed the throttle heading into the back straight of a nearly three-mile-long race track, I couldn't help but center my mind on two ostensibly disparate subjects: physics and pistons. If the heart of an automobile is its engine, the heart of the engine are its rotating bits – the crankshaft, pistons and the block they're nested inside. It seems fitting, then, that the internals of the twin-turbocharged 4.0-liter V8 typify the brand-new 2015 Mercedes-AMG C63 sedan I found myself piloting in Portugal. Whereas the last C-Class AMG availed itself of a brute of an engine, employing 6.2 liters of displacement to make its 451 horsepower the old fashioned way, the latest AMG's V8 engine has been downsized radically. I had the opportunity earlier in the day to actually hold the pistons of the new 4.0 Biturbo V8 in my hands, alongside those of the outgoing 6.2. The difference in size is staggering, the new lumps looking downright picayune in comparison to the latter. These eight seemingly diminutive pistons turn combustion into crankshaft-spinning power inside a block that is smaller, lighter and more compact than I'd have thought possible, considering the prodigious output the engine spits out. I had gone into this assignment expecting to pen an ode to lost love; a sonnet of sorrow bemoaning the switch from massive cylinders to wheezing power adders. But I was wrong. In fact, the report that follows may indeed read a little like a love song, except it will heap praise not on what used to be, but instead on what is now possible. The new heart of AMG more than makes up for its reduction in size by relying on turbochargers and smart engineering to turn just 4.0 liters into 469 horsepower and 479 pound-feet of torque starting at just 1,750 rpm, or as much as 503 ponies and 516 lb-ft in uprated S guise. Foot to the floor, eyes focused on the turn ahead, a hard right-hander named Primeira that requires hard braking and quick reflexes, I had a fleeting moment of clarity: These are some hard-working pistons. A few days on the street and track in and around Faro, Portugal, has convinced me that the new Mercedes-AMG C63 is a better car in any meaningful measurement than it was before. And I'll go one step further. Not only is this the best C-Class AMG ever, it's also my new favorite in the hotly contested segment that includes such knee-benders as the BMW M3 and M4.

Mercedes has X6 in its crosshairs with the GLE Coupe

In the last month, Mercedes-Benz has taken the sheet off two versions of its GLE Coupe: the 450 AMG and Mercedes-AMG GLE63 S. The models represent the German brand's shot across the bow at the BMW X6 in the luxury-crossover-four-door-coupe segment, including the high-performance M version of the bodystyle. Not much separates the styling between the two versions. Both feature sweeping arches over the hood and roofline to create their coupe-like appearance. Up front there are huge air intakes with a wide grille on top that's bisected by the brand's traditional star. The AMG version tweaks that look with the division's A-wing grille. At the rear, there are wraparound taillights and a chrome strip. The higher performance version also sports a modified diffuser and air outlets. No matter which one buyers choose, they get a healthy amount of power nestled under the hood. The 450 AMG packs a 3.0-liter, twin-turbo V6 with 362 horsepower and 384 pound-feet of torque with a nine-speed automatic. Opting for the GLE63 means a massive boost with 577 hp and 561 pound-feet from a 5.5-liter twin-turbo V8 routing through a seven-speed auto gearbox. Either way, customers get Merc's 4Matic all-wheel drive system. The luxury crossover coupe segment is often maligned for looking awkward, but Mercedes clearly sees room to grow there. Check them both out live from the 2015 Detroit Auto Show floor in the galleries above.

'55 Mercedes Gullwing racer expected to sell for $6 million

RM Sotheby's has a Gullwing up for auction. Not just any Gullwing, but one of just four prepared by the factory for racing. And it's expected to fetch $6,000,000, (give or take a million) when it crosses the auction block next month in New York. Chassis number 5500640 is billed as "the rarest and most desirable W198 Gullwing ever presented for public auction," and it's not hard to see why. It was used for both racing and testing purposes, including an entry in the notoriously grueling Tour de France by none other than Sir Stirling Moss. He placed it second only to the Marquis de Portago in his Ferrari 250 GT TdF, often outperforming the Ferrari in stages of the event. It was in the possession of one owner since 1966, who stored it for 40 years before passing it on to his son in 2008, who in turn underwrote a comprehensive three-year restoration project and has now put it up for auction. Gullwings are invariably the most sought-after post-war production Mercedes when they come up for auction. The highest price one has ever garnered, according to the records at Sports Car Market, was $4.62 million paid in early 2012 at Gooding & Company's Scottsdale auction. This example, however, stands to far surpass that amount to set a new record. It's just one of several notable lots consigned for the Driven By Disruption event, set to take place on December 10 in New York. Alongside it, RM has the Lamborghini Concept S (valued at over $2.4 million), a 1962 Aston Martin DB4 GT Zagato (over $16m), and a 1956 Ferrari 290 MM driven by Juan Manuel Fangio ($28m). In short, it ought to be a significant sale, and we'll report the results once they're in.