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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.

Mercedes-Benz A45 AMG shows up to fight the hottest hatches [w/videos]

Fun coincidence. On the same day that Audi announces the unveiling of its new S3 Sportback at the Geneva Motor Show, Mercedes-Benz steals the spotlight by confirming that the all-new A45 AMG will also receive its official debut early next month. Starting life as the entry-level A-Class hatchback, the A45 AMG gets the full AMG treatment, which includes numerous performance, handling and styling upgrades.
Under the hood sits an AMG-tuned 2.0-liter turbocharged I4 breathing through a sport exhaust system helping the five-door produce 360 horsepower and 332 pound-feet of torque. This engine is paired to a seven-speed AMG dual-clutch transmission and power is sent to the ground using 4Matic all-wheel drive. Mercedes-Benz says that the A45 AMG will be able to accelerate from 0-60 miles per hour in under 4.5 seconds and it will have a top speed of 155 mph; in the land of hot hatches, it doesn't get much hotter than that. For added performance and handling, AMG has retuned the A-Class' suspension and steering systems and equipped The A45 with a three-stage stability control system that is specific to this car.
Surprisingly, the exterior styling of the A-Class was already sporty enough that the new model doesn't receive too many changes to become the A45 AMG. The biggest alterations include black accents to the chin spoiler, rocker panels and mirror caps, black wheels with red-painted brake calipers and rectangular dual exhaust outlets. Inside, it doesn't take a trained eye to spot the differences. The flat-bottomed sport steering wheel and the numerous red accents throughout the cabin (including the seatbelts!) really help to make this AMG interior stand out; front passengers will also get sport bucket seats that appear to be more than supportive enough for even the most spirited driving conditions.

Smart brand might be doomed

Reports are painting a less than rosy picture of the Smart brand's future. The Daimler-owned carmaker is going fully electric in 2020, but that might not be enough to keep it alive for long. Inside sources, quoted by Automobile Magazine, are saying Renault is likely to pull out of the partnership that created the current Smart ForTwo/Renault Twingo pairing introduced in 2014. The two rear-engined cars share a platform, and when the current Twingo is done for, Renault might want to part ways. In addition, Mercedes isn't willing to prop up Smart on its own, and there is a possibility that the entire Smart brand could be shuttered by 2026. A previous joint venture was the ForFour hatch co-developed with Mitsubishi, and despite the ForFour name living on in the current generation rear-engined car, the earlier FWD hatchback has quickly been forgotten. Not long ago, Smart presented its Forease open-top concept to give customers a glimpse of what future Smart cars would look like, but at its heart the Forease was still a current Smart dressed up with concept car details. The next-generation Mercedes-Benz A-Class is to be signed off in 2021 for a 2025 introduction, and it can be underpinned by a more flexible, fully scalable platform that could also serve to support a new entry-level Mercedes-Benz vehicle that could render the separate Smart brand pointless. Then there's Geely, who now owns nearly 10 percent of Daimler, and who is partnering with Daimler to launch a new "premium" ride-hailing venture in China. As Geely develops its mobility solutions, it is likely to keep an eye on Smart: Smart cars have been car-sharing staples around the world for quite a while, from users such as Car2Go. Automobile Magazine says that if a Smart is co-developed with Geely, it might suit the Chinese market well, but a global business case might be challenging. In any case, if Smart wants to survive beyond the current Renault partnership, the new model should be agreed upon quickly, and it must be based on a platform flexible enough to support full electric drive. Reportedly, there are now ongoing feasibility studies for a fully electric Daimler "U-Class," which would include a Smart-like three or five-door hatch with two wheelbase options, a ride-sharing shuttle with autonomous capabilities, and an urban delivery panel van. But Smart must justify itself for the upcoming decades, or the future Daimler products that occupy its niche will be wearing a three-pointed star instead.