Mercedes ML Diesel Changes?

drewkeen

Veteran Member
Joined
Jan 16, 2008
Location
Nashville, TN, USA
TDI
Jetta
Trying to get some useful info on the ML320/350 Diesel and changes they made. All I can find is navi differences, etc.

Seems the major groups are:
07/08 ML320 CDI

09+ ML320 Bluetec

ML350 Bluetec

I see that the 09 got the urea/adblue and picked up a few hp. Did they drop rail pressure or anything else like VW did?

Why do the later cars get a MPG bump over the earlier ones? Any mechanical changes? Lighter?

Any mechanical info would be greatly appreciated!
 

moosejaw

Veteran Member
Joined
Jan 17, 2005
Location
St. Louis, MO
TDI
*Sold* 2005 Passat GLS TDI Shadow Blue
The ML are V6 OM-642. No real difference between '08-'09 the BlueTech cross over years. In '12 they boosted the output of the OM-642 to 240hp. For the next change over '15 or '16 they went to a 4 cylinder diesel @ 215hp with much higher fuel economy.

My '09 fuel economy is 24 Mpg over 20k of usage. I am not sure about the '08 as my brother drives it, does a lot of idling and doesn't track fuel economy.

The drivetrain is basically unchanged from '06 - '14. 7 speed trans with single speed transfer case. There were some small changes in torque bias front/rear but nothing to note.
 
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