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2015 Mercedes-Benz ML400 Quick Spin

Mercedes-Benz has taken a risk in its quest to downsize its engine range. For 2015, the brand's popular M-Class five-passenger CUV did away with its trusty 4.4-liter, twin-turbocharged V8, and has replaced it with a 3.0-liter, twin-turbocharged V6. It's no surprise that power is down thanks to this move. Outputs of 402 horsepower and 443 pound-feet of torque are replaced by 329 hp and 354 lb-ft, but weight is down significantly as well. The new ML400 is nearly 300 pounds lighter than the 4,982-pound ML550. Will that tradeoff be enough to satisfy a buying public that's embraced falling fuel prices by buying bigger and thirstier vehicles? To find out if the blown V6 is a suitable replacement for the twin-turbo V8, we spent a week at the helm of the all-new ML400. Driving Notes This 3.0-liter, twin-turbocharged V6 is the same engine being offered in the C400 and E400 sedans. Typical of today's turbocharged engines, peak torque is spread lavishly across the rev range, from 1,600 to 4,000 rpm. That's not as generous a spread as the ML550, which offers all its torque between 1,600 and 4,750, but the power on offer is easy to access. Importantly, the new V6 never feels flat-footed or unable to answer our commands. In fact, the ML400 feels even quicker than its six-second sprint to 60 would indicate, although it's not so fast as to challenge the 5.3-second time of the ML550. After a slight and expected bout of turbo lag, the power arrives suddenly and proceeds linearly until just south of the engine's 6,500-rpm redline. The throttle response is soft in Eco mode, as expected, but sharpens up slightly when the fuel-sipping mode is off, where the gas pedal is still easy to modulate. It's a quiet engine, too. Compared to the brawnier exhaust note of the old ML550 or the howling six-cylinder in the BMW X5 xDrive35i, the ML400's note is smooth and refined, befitting of a V6. Its turbocharged nature is instantly noticed, though. Get on the throttle and the 3.0-liter happily hisses its way up the tachometer. But, it's only when you get on the throttle hard that the engine really weighs in. In day-to-day driving and traffic its soundtrack is unobtrusive and relaxed. The EPA rates the ML400's fuel economy at 18-miles-per-gallon city and a 22-mpg on the highway. That's better than the 14 city and 19 highway of the old V8 ML, but it still seems a bit low, especially for the highway figure.

Aston Martin reboots its EV offensive with Mercedes-Benz technology

Mercedes-Benz will provide Aston Martin the technology it needs to enter the electric car segment, according to the British firm's top executive. Its first battery-powered model is scheduled to arrive in 2025 at the earliest. As we've previously reported, Mercedes will increase its stake in Aston Martin to 20% by 2023. In exchange, it will grant the company access to its hybrid and electric powertrains. It's a win-win situation: On one hand, Mercedes can leverage the benefits of economies of scale. On the other hand, Aston Martin (which is far smaller) is able to access turn-key technology without spending an exorbitant amount of money on development. Executives are consequently rebooting Aston Martin's on-again, off-again electrification offensive. Its first electric model will be built using Mercedes-Benz-sourced technology when it goes on sale in 2025 or 2026, according to Automotive News Europe. Company boss Tobias Moers (who ran Mercedes-AMG until earlier in 2020) clarified the platform will come from Germany, but there's no word yet on whether the motor and the battery will, too. However, he confirmed plans to resurrect the Lagonda name on an electric-only sub-brand have been canceled. "Lagonda has a different purpose for the future. Electric-driven cars are supposed to be Aston Martins," he said. Hybrids are in the pipeline, too, including a gasoline-electric version of the high-riding DBX. Engineers were previously developing the technology in-house, but the project could end up in the automotive ash heap now that more Mercedes powertrains are in the picture. Moers affirmed he hasn't decided which route to take yet. "We are still working on that [hybrid drivetrain], but now we have alternatives. It's too early to say," he noted. Aston Martin will release the mid-engined Valhalla in 2021, and the plug-in hybrid DBX will begin rolling off the production line in 2023. Several new models will make their debut that year, Moers promised a "product firework," and it's reasonable to assume most will be available with some degree of electrification. He predicted every fourth or fifth car Aston Martin sells in 2024 will be electrified in one way or another. Green blues Aston Martin's path to electrification hasn't been smooth. In 2015, it joined forces with China-based LeEco to build an electric variant of the Rapide, but it was forced to finish the project on its own after its partner canceled the deal due to financial issues.

Recharge Wrap-up: Honda FCV Concept comes to Detroit, Toyota seeks young green energy fellows

Honda will bring its FCV Concept to the 2015 North American International Auto Show in Detroit in January. The hydrogen-powered concept made its Japanese debut in November, and will now make its way to North America for the first time. The FCV concept improves upon the design of the FCX Clarity with a more striking appearance and roomier interior. Its smaller powertrain packaging means more space for people, and the FCV Concept seats five passengers. Honda also expects the next-generation fuel-cell car, which is scheduled to go on sale in Japan in March 2016, to cost less and have a range of over 300 miles. Read more in the press release below. The Mercedes-Benz B-Class Electric Drive has been awarded an environmental certificate from the TUV Sud technical inspection authority. The certificate is based not just on the vehicle's operation, but the entire lifecycle of the car, including production and recycling. The B-Class Electric Drive produces 24 percent less CO2 over its lifecycle than the Mercedes-Benz B180 when using the EU electricity mix, and 64 percent less when powered by hydroelectricity. Mercedes credits not just the use of electricity, but also the car's energy management system - such as its radar-based regenerative braking - for its carbon reductions. Read more in the press release below. Scania will test a wirelessly charged plug-in hybrid bus in Sweden. Beginning in June 2016, the bus will be put to daily use in Sodertalje. One of its stops will have a wireless charging station where the bus will recharge for six to seven minutes before continuing on its route again. The charger is located under the road surface and the bus positions itself above it to charge inductively. About $1.3 million will come from the Swedish Energy Agency to fund the test project, which could save up to 90 percent of fuel costs. If expanded to a fleet of 2,000 buses, it could save up to 13 million gallons of fuel each year. Read more at Green Car Congress, and in the press release below. Sandia National Laboratories and Linde are teaming up to expand hydrogen fueling infrastructure. The two groups have signed an agreement to research and develop new hydrogen stations, as well as ways to make fuel cell vehicles more desirable for consumers. They are looking at ways to incorporate hydrogen into existing fuel stations where possible, and make sure that it is able to be done safely.