kkarb

Hello.

Im wondering how often the dpf regen syclus should happen at the 350 bluetec`s? And im talking ONLY about the 350 bluetec engine OM642.8xx, NOT the pre bluetec OM642.9xx.

I have a w164 ML350 cdi, year 2010, and i have a w166 ML350 Bluetec. The old one w164, has a huge longer regen cyclus than the newer w166. A tech told me that the cyclus is much shorter for the new om642 bluetec, vs the old om642 pre bluetec. For my Bluetec, my cyclus is about 300km for city driving, and 700km for highway driving. Isnt it to less???

Is there any GL350 Bluetec, ML350 Bluetec, R350 Bluetec or E350 Bluetec owners, who can tell me about their dpf regen cyclus?

When dpt regen is running, the idle is about 800rpm, and the radiator fan run for full for about 20 mins.

Regards

Etienne Lau

That sounds about right. It is always shorting during city driving and longer on highways due to more soot production while idling, etc...

kkarb

Thanks for reply

Yes, but it has to be a different DPF regen logic in ecu for the om642.824 bluetec engine. My 350cdi with om642.940 (pre bluetec) has a much longer cyclus, even in city driving.

Regards

Etienne Lau

If you have pre bluetec it did not need to meet more current stringent epa particulate standards.

kkarb

So the conclution: A om642.8xx bluetec engine, does a dpf regen more often than a om642.9xx PRE bluetec engine.. Even if both of the are fitted with a dpf.

Etienne Lau

BTW your your 2010 is not pre-blutec. It is bluetec. Bluetec is any MB diesel that uses DEF to reduce NOx. DPF is a separate issue from NOx. In 2007 EPA, mandated stringent emmisions requirements for diesels, NOx and Diesel Particulate.

MB also changed oil specifications from 2007 to current due to oil saps content was clogging/contaminating dog

kkarb

NO NO NO, thats not correct. My 2010 ML350 cdi (w164) is NOT bluetech, its a regular cdi, no bluetec. The engine fitted on this car is om642.940, and its not a bluetec car, no DEF. But my never 2013 w166 ML350 is a bluetec car, and this one has engine om642.824. This one using DEF fluid. Maybe its different from country to country.
But back to basic, my 350 bluetec regenerating dpf much more often than the older w164 ML350cdi. And i was asking 350 bluetec owners about milage betwen dpf regen syclus.

Etienne Lau

Does not help if you don't state which country you are from. The fact that US went bluetec in 2007 and your country later does not matter. What I stated is still fact. Emissions changes have resulted in more often regen. Using the wrong oil will also result in more often regen, especially using mid or high saps oil when you should be using low saps.

kkarb

ok, in my country, Norway, no ML`s are bluetec before 2012. All w164 2005 to 2011 are pre bluetec, also the facelaft from 2009 -2011 are pre bluetec. The firs ML bleutec is the 2012 w166 250 / 350