Bluetec -what is real advantage? - Mercedes-Benz Forum

 
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post #1 of 7 (permalink) Old 03-02-2009, 10:48 AM Thread Starter
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Date registered: Dec 2005
Vehicle: W211 E320 Bluetec R129 SL500 - $1300 car ........ Ford F350 6l
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Bluetec -what is real advantage?

I am considering getting new (used) ride for the family and am split between 2006 320cdi and Bluetec engines.
From what I heard the Bluetec is much smoother running engine, but I can't hear or feel the 2005 cdi we have and can't imagine the real life difference. I hear the environmental pitches, but working with asbestos, lead, mercury big part of my life as well as absorbing part of Chernobyl radiation I am not going to worry about it.
The Bluetec offers only 9 more HP what is marginal as well, while the rated fuel economy drops full 5 MPG !!!!!
So for those who drive Bluetec what is the real life mileage? In my 320cdi I experienced 49 mpg at 80 mph on flat land and no traffic, while even crazy traffic in Bay Area gives me 32 mpg easily.

Last edited by Kajtek1; 03-02-2009 at 10:51 AM.
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post #2 of 7 (permalink) Old 03-02-2009, 01:27 PM
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Date registered: May 2005
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A better question is to simply ask the differences between the OM648 (I6) and the OM642 (V6).

The first difference is that the older engine arrived in 1998 (in Europe) and the newer engine in 2006. That by definition means newer technology.

The V6 is clearly designed with more stringent emissions regs in mind.

The V6 is aluminum, and is therefore lighter.

The V6 is actually 3.0 l and the I6 is actually 3.2 l.

The same displacement V6 is used in models labeled 280 and 320, the difference being state of tune. With previous inline engines, there was a 270 and 320, the difference being the former was an inline 5.

"Bluetec" describes the exhaust system and not the engine. There is no "Bluetec" reference related to any '07-'08 M, GL, R, or Sprinter. Certainly not every European Mercedes with the V6 is labeled "Bluetec."

Not sure about the Sprinter, but all other USA V6 arrive with diesel particulate filter, which means no diesel smell, no soot on exhaust pipe ends, and requirement for low-ash motor oil. The W211s with "Bluetec" badge have additional exhaust system components (and lower horsepower) but not urea injection. Urea injection arrived with 2009 M, GL, and R, which are therefore 50-state legal.

In my experience the V6 is a much more refined engine, i.e. lots quieter and smoother.

In my experience with Mercedes--dating back to early '80s--older is NEVER better. This is a negative (partly cloudy) way to put it of course, and it's better to say that Mercedes is an upfront company that makes truly worthy innovations when it changes its cars.

In your looking at W211, '07-on means you get a "facelift" model, which has between 1000 and 2000 changes compared to previous versions. Because of the different bodies we own, I can't compare fuel economy between the two engines (in reality it's 10mpg highway) but it wouldn't surprise me if the V6 is a little less than the I6 in the same body--penalty for better emissions control, I imagine. I'd still expect, however, when it's all added up, the newer the better.

Kent Christensen
Albuquerque
'07 GL320CDI

Last edited by lkchris; 03-02-2009 at 01:34 PM.
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post #3 of 7 (permalink) Old 03-02-2009, 02:10 PM Thread Starter
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Thanks for the opinion.
Just to elaborate on "the newer the better" my priority is fuel economy and the new fails drastically here.
Than remember the "update" in diesel from 1985 to 1986 ?
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post #4 of 7 (permalink) Old 03-02-2009, 05:44 PM
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Bluetec advantage

I believe the only advantage to Blueterc diesels accrues to MB Corp. It allows them to sell the car (engine) in more U.S.A. states. There is additional complication where in my opinion. a basically simple engine is already overcomplicated in the name of emissions and noise.

Just so you don't think I am a Philistine, I have one, a 2008 E320. I do wish however that my wife would have been satisfied with a nicely restored W123 300D.
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post #5 of 7 (permalink) Old 03-02-2009, 08:38 PM
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Quote:
Originally Posted by rocky raccoon View Post
Just so you don't think I am a Philistine, I have one, a 2008 E320. I do wish however that my wife would have been satisfied with a nicely restored W123 300D.
My wife isn't going back to her previous 300E now that she has the E320CDI either! She loves the power.

Kent Christensen
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'07 GL320CDI
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post #6 of 7 (permalink) Old 03-02-2009, 09:25 PM Thread Starter
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Date registered: Dec 2005
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My wife doesn't care much about power, since on the mostly freeway driving anything above 140 HP will do, but she really admire fact that in W211 we can talk without raising our voices. She really could use GPS ... if she learn how to operate it.
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post #7 of 7 (permalink) Old 03-04-2009, 07:21 PM
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If the CDI is still in warranty do NOT put bio diesel in it.
If MB finds out they will NOT cover any part of the reapir and will void the rest of the warranty for the engine,exhaust and fuel system
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