Mercedes-Benz developed the nine-speed automatic transmission

Mercedes said were equipped with a seven-speed gearbox and five-speed gearbox is compared with a model , low fuel consumption per hundred kilometers of the former than the latter 0.6 liters . The former can skip the intermediate gear downshift to complete the process , help to shorten the acceleration time , so acceleration is more robust.

The gearbox can also be achieved in two reverse proportion, 3.416 ,subaru impreza wrx turbocharger and 2.231 . In comfort mode, usually used in the second forward gears and a second reverse gear. In addition, 722.9 gearbox housing material is the industry 's first - magnesium alloy material, can effectively control the weight of the cabinet .

July 2010 , there is news contest with rival Mercedes-Benz developed the nine-speed automatic transmission, powered by a Mercedes-Benz will initially determined independently developed models that subsection gearbox in 2012 S-Class sedan. According to the official statement , compared to the seven-speed automatic gearbox, the new nine-speed automatic transmission developed to provide more efficient fuel economy , and can effectively control carbon dioxide emissions .

But by 2012 , the Mercedes-Benz S-Class is equipped with a new gearbox failure on schedule , still use a seven-speed automatic transmission. Until this year , the official once again hinted that the newly developed nine Mercedes -speed automatic transmission will be served in the 2014 Mercedes-Benz E350. E350 is equipped with the technology after , 0 ~ 100km / h acceleration time of up to 6.6 seconds , making the additional two ratio increased from 5.5L/100km fuel consumption dropped 5.3L/100km. Also reduced the amount of carbon dioxide released from the original 144g/km 138g/km.

" One moves ," the phrase used in the Mercedes-Benz now the situation is easy to do . Pregnant grabbed seven-speed glory , but lost the passion to break new ground in that year .subaru wrx turbocharger Speed is always firmly believed that nine technically capable of the highest level, and for the nine-speed consumers will not pay more than a machine . Destined to end up being caught up and blow .

As early as the Geneva Motor Show this March , 2014 Land Rover Range Rover Aurora world debut , the new German ZF nine-speed automatic transmission replaces the old six-speed Range Rover Aurora , an increase of three on the gear ratio and weight than six speed of 16.5 pounds lighter . New gear combinations can lead to higher fuel efficiency and lower emissions. Year, General Motors and Ford announced that it will jointly develop nine and ten speed -speed automatic transmission .

Summary: The more transmission gear , the higher fuel efficiency , emissions more environmentally friendly, this must be the trend of the future transmission development. It is foreseeable that any attempt to stop the trend of behavior is futile. There is no stagnant trend , only to keep up with the trend of the laggards .