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Aston Martin's deal with Mercedes-AMG more than skin-deep

Aston Martin is working on a raft of new models. But it's not going it alone: it has a technical partnership with Mercedes-AMG, the details of which have only been revealed in bits and pieces. If these latest spy shots are anything to go by, however, the arrangement could run deeper than anyone initially let on. Spied undergoing testing at the Nurburgring, this prototype for the upcoming successor to the Aston Martin DB9 is widely expected to be called the DB11 (10 is being used by James Bond's new ride). From the outside it doesn't look different than the previous versions we've seen running around, but this time we can also peer into the cabin, and that's where things start to get interesting. Despite the best arm-waving efforts by the development engineers, our spy photographers managed to snap a couple of shots of the interior. And though it looks far from being ready for production, the components we see appear to have been lifted from the Mercedes S-Class Coupe – particularly the steering wheel, digital instrument cluster, and almost the entire center console. This speaks to a deeper collaboration between the British and German automakers. The 4.0-liter twin-turbo V8 from the Mercedes-AMG GT, C63, and G500 4x42 is already being adapted for use in the next generation of Astons. Related Video:

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 S-Class Cabriolet completes the luxury trinity

In its continuing bid to simply eat the lunch of the Bentley Continental GT, Mercedes-Benz has followed up on the S-Class sedan and coupe with a new S-Class Cabriolet. Aristocrats, take notice. Below the beltline, all is familiar. That means the same stylish sheetmetal, from the chiseled front fascia to the strong character lines to the pert rear end. Expect the cabin's accommodations to mirror the hardtop model. But the third member of the S-Class family differs above the beltline, where we see a sumptuous canvas roof. The three-layered top is, unsurprisingly, quite advanced. It uses a three-layer, acoustically optimized design that promises a quiet ride. The top can be dropped or raised in under 20 seconds and at speeds of 37 miles per hour. Finally, the addition of a canvas cover doesn't do much to the S-Class' aerodynamics, as the cabriolet still returns an impressive 0.29, which compares favorably with the 0.27 of the four-door model (the coupe's CoD isn't available). Opting for the S-Class Cabriolet will entitle you to some additional standard equipment, including Mercedes' AirScarf neck heater. The droptop will also pioneer the German brand's new Thermotronic climate feature, which takes complete control of the HVAC system and makes adjustments based on the findings of 12 sensors and 18 actuators. The sensors include those for interior and exterior temperature, solar radiation, air quality, and dew point, among others. Yes, your S-Class will have a sensor for the dewpoint. Also new to the S-Class Cabriolet – not to mention the S-Class line as a whole – is a 9G-Tronic nine-speed automatic transmission, which is already featured on the SLK-Class and the new GLC-Class. The new 9AT will be limited to the S550, while the new S63 Cabriolet will use the coupe's seven-speed AMG Speedshift transmission. Both engines, meanwhile, mirror their coupe counterparts, with 449 horsepower and 516 pound-feet of torque for the S550 and 577 hp and 664 lb-ft of torque on the AMG model, allowing the latter to hit 60 mph in just 3.9 seconds and reach a limited top speed of 186 mph. Both the S550 cabriolet and its Mercedes-AMG counterpart will make their global debut at the 2015 Frankfurt Motor Show, later this month. Read on for the full press release from Mercedes-Benz. The new Mercedes-Benz S-Class Cabriolet Open-top luxury Stuttgart. The new S-Class Cabriolet is the fourth variant of the current S-Class family in the U.S.