Mercedes-Benz has disclosed additional details and photos of the 9G-TRONIC nine-speed automatic transmission.

Mercedes-Benz has disclosed additional details and photos of the 9G-TRONIC nine-speed automatic transmission.

Available for the E350 BlueTec sedan and estate, the nine-speed auto 'box comes as standard for the 252 HP (185 kW) V6 diesel and brings improvements in fuel efficiency and CO2 emissions. The sedan achieves a fuel consumption of 5.3 liters / 100 km in the NEDC cycle, while the estate is 0.2 liters / 100 km thirstier. CO2 emissions have been reduced to 138 g/km for the sedan and 144 g/km for the estate.

Aside from these improvements, external noise has been reduced by up to 4 dB thanks to the overall reduction in engine speed which has also improved comfort inside the cabin. The new gearbox has just about the same size as the previous seven-speed 7G-TRONIC despite the two added ratios. It's also lighter than its predecessor although Mercedes-Benz didn't say by how much.

The sedan will sprint to 62 mph (100 km/h) in 6.6 seconds which makes it 0.3 seconds quicker than the estate fitted with the same 9G-TRONIC. Both of them share the same electronically-capped top speed of 155 mph (250 km/h). Mercedes-Benz says the car can be comfortably driven in ninth gear at 74.5 mph (120 km/h) with an engine speed of only 1,350 rpm.

The 2014 Mercedes-Benz E 350 BlueTec sedan with 9G-TRONIC starts in Germany from 54,710 EUR (VAT included), followed by the estate at 57,923 EUR.

The 9G-TRONIC gearbox is compatible with rear- and all-wheel drives, together with plug-in hybrid or hybrid drive systems. It will eventually be available in most of the firm's models and engines in the upcoming years.

Full details can be found in the attached press release.

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Mercedes-Benz details 9G-TRONIC nine-speed automatic transmission