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Mercedes-Benz engines with 48-volt systems coming in 2017

As part of a big green push announced yesterday, Mercedes-Benz is jumping into the world of 48-volt power. The company will launch a new family of efficient gasoline engines next year and will begin rolling out 48-volt systems with it, likely in its more expensive cars first. Mercedes will use the 48-volt systems to power mild-hybrid functions like energy recuperation (commonly called brake regeneration), engine stop-start, electric boost, and even moving a car from a stop on electric power alone. These features will be enabled through either an integrated starter-generator (Mercedes abbreviates it ISG) or a belt-driven generator (RSG). (RSG is from the German word for belt-driven generator, Riemenstartergeneratoren. That's your language lesson for the day.) Mercedes didn't offer many other details on the new family of engines. There are 48-volt systems already in production; Audi's three-compressor SQ7 engine uses an electric supercharger run by a 48-volt system, and there's a new SQ5 diesel on the horizon that will use a similar setup with the medium-voltage system. Electric superchargers require a lot of juice, which can be fed by either a supercapacitor or batteries in a 48-volt system. Why 48-volt Matters: Current hybrid and battery-electric vehicles make use of very high voltages in their batteries, motors, and the wiring that connects them, usually around 200 to 600 volts. The high voltage gives them enough power to move a big vehicle, but it also creates safety issues. The way to mitigate those safety issues is with added equipment, and that increases both cost and weight. You can see where this is going. By switching to a 48-volt system, the high-voltage issues go away and the electrical architecture benefits from four times the voltage of a normal vehicle system and uses the same current, providing four times the power. The electrical architecture will cost more than a 12-volt system but less than the complex and more dangerous systems in current electrified vehicles. The added cost makes sense now because automakers are running out of ways to wisely spend money for efficiency gains. Cars can retain a cheaper 12-volt battery for lower-power accessories and run the high-draw systems on the 48-volt circuit. The industry is moving toward 48-volt power, with the SAE working on a standard for the systems and Delphi claiming a 10-percent increase in fuel economy for cars that make the switch.

2015 Mercedes-Benz S63 AMG Coupe

Conventional wisdom would dictate that adding more power and several key performance enhancements to an already very good car, like the 2015 Mercedes-Benz S550 Coupe, will end up equaling an even better car. In the case of the 2015 Mercedes-Benz S63 AMG Coupe, conventional wisdom sort of applies, but perhaps not as much as we'd have initially guessed. We'll get into the nitty gritty details in just a moment, but here's the most immediate takeaway we had in our minds as we walked away from this super coupe: The S63 AMG is excellent, but so is the slightly more mundane S550 Coupe on which it is based, and which is priced some $41,000 less expensive than its more powerful sibling. Chew on those figures while we examine what differentiates the two S-Class Coupes. Drive Notes As expected, the single greatest highlight of the 2015 S63 Coupe is its engine. As a powerplant, it's a gem. As a hand-built engineering exercise, its 577 horsepower and 664 pound-feet of torque are just as impressive in real life as they sound when recited from stat sheets. Not that the old CL63 AMG was lacking in power, but the new S63 AMG Coupe boasts 41 more horses and 74 more lb-ft than the outgoing engine. The run to 60 miles per hour takes a scant 3.9 seconds, according to M-B, aided in no small part by the car's 4Matic all-wheel-drive system and other assorted electronic brains deciding where, exactly, all those ponies should be sent. The rear-biased system is tuned to send two-thirds of the engine's power to the rear wheels in a bid to make the car feel more like what performance-minded drivers expect. Top speed is electronically limited to 186 miles per hour, which is plenty fast enough, even in the days of 200-plus-mph sedans from M-B's former corporate cousin Dodge. We didn't get anywhere near the car's maximum velocity, but our brief trips into triple-digit territory were quiet, comfortable and completely free of drama. The seven-speed automatic gearbox responds quickly to requests of your right foot, but the steering wheel-mounted paddles don't change gears as quickly as we'd like when in Manual mode. Controlled Efficiency (which we'd call Comfort) maximizes efficiency, keeping the transmission in higher gears and shifting earlier than when in Sport mode, and we didn't find much fault with the computer's shifting algorithms in either setting.

Mercedes-Maybach GLS could become the most expensive car made in America

Mercedes-Benz International, the German automaker's manufacturing facility near Vance and Tuscaloosa, Ala., already builds the GLS SUV. Autonews reports that the coming ultra-luxe version of the large crossover, the Mercedes-Maybach GLS, will be built in Alabama as well for global markets. The most recent timelines mark the reveal in production or near-production form in China, with sales to commence next year. The next-gen series-production GLS goes on sale later this year. The gilded sub-brand previewed a wild concept last year in China called the Vision Mercedes-Maybach Ultimate Luxury, which blended the tall profile of an SUV with the truck of a sedan on donk wheels. Based on spy shots, none of that fancy will make it to production. Both the Maybach and AMG versions of the GLS ride on fat rubber but look thoroughly traditional. The treasure will be inside. Autonews said China accounts for roughly 75 percent of Maybach S-Class sedan sales. That suggests the GLS in baroque trim will emphasize chauffeured luxury touches like rear captain's chairs and lots of rear legroom. Pricing estimates figure $200,000 to get in the door. That would put the SUV right in line with the Lamborghini Urus and a couple stacks of Benjamins above the Bentley Bentayga, with much the same likely audience. One analyst said, "The ultra-high-net-worth kids want something different, and these ultraluxury SUVs certainly fit that," while another opined on its "appeal to the Kardashians and hip-hoppers, if they want something slightly different to the G-Wagen." A $200K MSRP would also comfortably make the Maybach GLS the most expensive new car built in America, taking the title from the Acura NSX. With a great price comes great power, said to be a twin-turbo V8 with more than 560 horsepower. The coming GLS 450 will make do with somewhere around 360 hp. The Alabama plant, which also builds the GLE, GLE Coupe, and C-Class, is also undergoing a $1 billion upgrade to more than double the size of the facility, making lines for battery production and EQ-series vehicle assembly,