The Mercedes-Benz ML350 BlueTEC uses a completely reworked 3.0-liter V6 engine, which meets emissions standards in all 50 states and delivers far better performance, yet with considerably reduced fuel consumption. The efficiency improvements have been achieved, above all, through the use of the innovative TWAS (twinwire- arc spraying) technology – in use since 2005 in AMG’s successful highperformance engines. The positive results at AMG have led Mercedes-Benz to adapt this cylinder wall coating technology for use in the V6 diesel engine as well. The process reduces internal friction in the engine significantly. At the same time, the weight has been reduced by 9.5 lbs., as there is no longer any need for the grey cast iron cylinder liners that, until now, had to be pressed into the engine block. The benefits are striking: with these measures alone, fuel consumption could be reduced by around 3 percent.
The Mercedes-Benz ML350 4MATIC gasoline-engine model, on the other hand, delivers impressive performance thanks to the new BlueDIRECT engine generation. The key is direct gasoline injection system with spray-guided combustion and new piezo injectors that have an injection pressure of 2,900 psi, together with fast, multi-spark ignition and a new combustion process.
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