Daimler has published detailed information and a series of new photos with the 2012 Mercedes ML, continuing to emphasise on the fact that their new generation SUV is much more efficient than the outgoing model.
Starting with the most eco-friendly version the 2012 Mercedes M Class engine range includes the ML 250 BlueTEC
4MATIC, the ML 350 BlueTEC 4MATIC, the ML 350 4MATIC BlueEFFICIENCY.
The ML 250 BlueTEC
4MATIC uses a 2.1-litre 4-cylinder diesel producing 204 horses and 500 Nm of torque,accelerates from 0 to 62 mph in 9 seconds and can returned between 43.4 and 47 mpg. Its Co2 emissions levels are 158 grammes of CO2 per Km.
On the ML 350 BlueTEC 4MATIC power comes from a 3.0-litre V6 diesel rated at 258 HP and 620 Nm of torque. Thanks to this engine the NEDC combined consumption is between 38.1 and 41.5 mpg, while CO2 levels reach 179 g/Km. The 0 to 62 mph sprint time for the ML 350 BlueTEC is 7.4 seconds.
Lastly the most powerful version 2012 Mercedes M Class, the ML 350 4MATIC BlueEFFICIENCY is equipped with a petrol drinking 3.5-liter V6 that outputs 306 HP and 370 Nm of torque. Consumption and emission levels are between 32.1 and 33.2 mpg and 199 g/Km respectively, and apart from sprinting from nought to 62 mph in 7.6 seconds, this version is also capable of hitting a top speed of 146 mph.  
High-performance AMG version of the 2012 Mercedes ML powered by the new 5.5-litre twin-turbo V8 are also expected to be offered at a later time.
A comparison of the data with the corresponding predecessor models:

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  ML 250
BlueTEC
4MATIC
ML 300 CDI
BlueEFFICIENCY 4MATIC
(Predecessor)
ML 350
BlueTEC
4MATIC
ML 350 CDI
4MATIC
(Predecessor)
Number of cylinders 4 6 6 6
Displacement               cc 2143 2987 2987 2987
Rated ouput                 hp 204 204 258 231
Max torque                Nm 500 500 620 540
NEDC combined
mpg 
CO2 / km
43.4 – 47.0
158
31.4 – 33.6
224
38.1 – 41.5
179
30.0 – 31.8
235-246
Acceleration
0 – 62 mph                     s
9.0 8.3 7.4 7.6
Top speed                 mph 130 130 139 136
Emissions standard EU6 EU5 EU6 EU5
 
 
ML 350 4MATIC BlueEFFICIENCY ML 350 4MATIC
(predecessor)
Number of cylinders 6 6
Displacement                  cc 3498 3498
Rated output                   hp  306 272
Max torque                   Nm 370 350
NEDC combined
consumption l/100 km
                         g CO2 / km
32.1 – 33.2
199
23.5 – 24.7
266
Acceleration
0-62 mph                         s
7.6 8.4
Top speed                     mph 146 139
Emissions standard EU5 EU5
Source: Mercedes