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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 and Mercedes-AMG formalize technical partnership

The development of a partnership between Mercedes-Benz and Aston Martin has been a long time coming. The news dates back to 2008, and over the five years since was supposed to lead to a rejuvenation of both the Maybach and Lagonda brands. That program ultimately fell apart, but the tie-in was forged afresh in July when the two automakers signed a letter of intent over a renewed partnership. And now that partnership has been formalized.
In a deal just announced, Mercedes-AMG will build a new V8 engine for Aston Martin that will power a new generation of luxury GTs for the British marque, presumably to replace the 4.7-liter V8 in the Vantage. The relationship appears to be similar to the one already in place between AMG and Pagani, only in this case, will involve Daimler taking as much as a five-percent stake in Aston Martin and an observer seat on Aston's board.
The technical partnership is also set to lead to the supply of electric and electronic systems, and could incorporate "additional areas of cooperation in the future." Whether that will include a fresh attempt at reviving Lagonda remains to be seen, as does the future of Aston's long-serving, Ford-based 6.0-liter V12 engine. But for now you can read the full announcement below.

Daimler chairman agrees with German Greens on reducing emissions

Daimler Chairman Dieter Zetsche spoke at a Green Party congress in Germany earlier this week and said he agreed with the party's urge to dramatically cut transportation-based greenhouse-gas emissions by expanding plug-in vehicle sales, Reuters says. Zetsche stopped short of backing the Greens' suggestion to ban gas- and diesel-powered vehicles by 2030, though. The man must keep his job, after all. Zetsche did say that reducing greenhouse-gas emissions from the transportation sector was "necessary," and his company has made plans to do just that. Daimler representatives said at the Paris Motor Show earlier this year that Smart and Mercedes-Benz both planned to debut more than 10 electric vehicles within the next decade, and that plug-ins may account for as much as 25 percent of Mercedes-Benz's sales by then. Moreover, Dr. Thomas Weber, Head of Group Research and Mercedes-Benz Cars Development, said in June that Mercedes could be selling as many as 100,000 EVs a year by the end of the decade. Last month, Mercedes-Benz announced that its EQ electric-SUV concept would go on sale by 2020, and that the Bremen factory that's producing the model will broaden its plug-in vehicle production further. Zetsche's cautious support notwithstanding, the German government appears to be doing its own part to reduce emissions from the country's light-duty vehicles. Earlier this year, Germany enacted a plan that provides as much as 4,000 euros ($4,270) in perks for people who buy new electric vehicles, with German automakers agreeing to foot about half of the estimated $1.4 billion bill. German lawmakers had also floated the idea of a 10-year moratorium on electric-vehicle taxes for cars purchased before 2020. Related Video: News Source: Reuters via Automotive News Europe-sub.req.Image Credit: Ralph Orlowski / Reuters Government/Legal Green Mercedes-Benz smart Electric