Jun 10, 2015, 06:58 PM
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Any reliability concerns with the DI engines for 2012 models?
Out Of Control!!
Joined: Jun 2008
Posts: 10,557
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From: Earth
Porsche Macan S SportDesign / Ex M-B's: 11 & 10 & 06 E350's, 02 S500
Too early to tell. Even though lots of manufacturers have had initial issues with D/I, the true test is how they will fare in the long term, and how they can avoid build up which can hamper reliability and performance. At this point, there's no way to know with M-B's versions though.
Senior Member
Joined: Nov 2011
Posts: 333
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From: Sacramento, CA
E350 BT
bluetec is direct injected, the older term was "CDI". The difference is that the diesel has somewhat of a lubricity contained within, to help the seals of the high pressure fuel pumps, which are the normal weak point in the U.S., due to a number of things, like the use of ethanol.
Senior Member
Joined: Mar 2005
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Lexus LS 400, 2008 BMW 528i, 2014 e250 BlueTec
I agree with 2 earlier comments but I have a strong confidence that MBZ did their home work well before releasing DI engine. As I understand, DI engine is more simpler than CDI engine and less problems prone.
Senior Member
Joined: Nov 2011
Posts: 333
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From: Sacramento, CA
E350 BT
Common rail Direct Injection ... they are the same design, for quite some time now. MB just dropped the CDI in favor of the bluetec nomenclature.
Super Member
Joined: Apr 2007
Posts: 561
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From: New Mexico
2014 E350, 2012 SL550
This was discussed in depth on the W204 forum since the C350 is the same engine as the E350.
Suggest you pay particular attention to Glyn Ruck's comments.
https://mbworld.org/forums/c-class-w...n-buildup.html
Regards,
Don
Suggest you pay particular attention to Glyn Ruck's comments.
https://mbworld.org/forums/c-class-w...n-buildup.html
Regards,
Don
Senior Member
Joined: Nov 2011
Posts: 333
Likes: 1
From: Sacramento, CA
E350 BT
This was discussed in depth on the W204 forum since the C350 is the same engine as the E350.
Suggest you pay particular attention to Glyn Ruck's comments.
https://mbworld.org/forums/c-class-w...n-buildup.html
Regards,
Don
Suggest you pay particular attention to Glyn Ruck's comments.
https://mbworld.org/forums/c-class-w...n-buildup.html
Regards,
Don
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Senior Member
Joined: May 2007
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asdas
Not too many Mercedes folk are doing things like tearing the top half of their motor down, so it is hard to tell for sure, but IMO, its a safe bet in 2-3 years we will be hearing about excessive carbon buildup from our DI motors. I must say, my years in the VW/Audi world were more fun in the way of modding because the enthusiasts there do all kinds of DIY work and info is more abundant there. I do like my w212 very much though.
I've heard of DI carbon buildup in both NA and forced induction setups from Mazda to Porsche and Audi, and there's not a thing different about Mercedes' implementation of DI that would prevent carbon buildup if it were to occur. This is precisely the reason why I decided to lease vs. buy.
I believe VW/Audi are adding an injector/s into their intake manifold to address the carbon buildup problem in their next generation of turbo charged DI engines.
I've heard of DI carbon buildup in both NA and forced induction setups from Mazda to Porsche and Audi, and there's not a thing different about Mercedes' implementation of DI that would prevent carbon buildup if it were to occur. This is precisely the reason why I decided to lease vs. buy.
I believe VW/Audi are adding an injector/s into their intake manifold to address the carbon buildup problem in their next generation of turbo charged DI engines.
Last edited by brauhaus313; Mar 13, 2012 at 09:35 PM.
Senior Member
Joined: Nov 2011
Posts: 333
Likes: 1
From: Sacramento, CA
E350 BT
Yes, a very long time, especially in the European Union, BMW, Volkswagen, etc. all have CDI/TDI designs with lots of success. Even BMW, with their high pressure fuel pumps fiasco with the gasoline engines, has had lots of success with the diesel variant, and on U.S. ULSD lower cetane diesel.
Senior Member
Joined: Apr 2011
Posts: 330
Likes: 1
From: Long Island, NY
2012 C63 AMG edition 1
Not too many Mercedes folk are doing things like tearing the top half of their motor down, so it is hard to tell for sure, but IMO, its a safe bet in 2-3 years we will be hearing about excessive carbon buildup from our DI motors. I must say, my years in the VW/Audi world were more fun in the way of modding because the enthusiasts there do all kinds of DIY work and info is more abundant there. I do like my w212 very much though.
I've heard of DI carbon buildup in both NA and forced induction setups from Mazda to Porsche and Audi, and there's not a thing different about Mercedes' implementation of DI that would prevent carbon buildup if it were to occur. This is precisely the reason why I decided to lease vs. buy.
I believe VW/Audi are adding an injector/s into their intake manifold to address the carbon buildup problem in their next generation of turbo charged DI engines.
I've heard of DI carbon buildup in both NA and forced induction setups from Mazda to Porsche and Audi, and there's not a thing different about Mercedes' implementation of DI that would prevent carbon buildup if it were to occur. This is precisely the reason why I decided to lease vs. buy.
I believe VW/Audi are adding an injector/s into their intake manifold to address the carbon buildup problem in their next generation of turbo charged DI engines.
Senior Member
Joined: Nov 2011
Posts: 333
Likes: 1
From: Sacramento, CA
E350 BT
MBWorld Fanatic!
Joined: Dec 2011
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W212 FL
It really is worth doing it because it cleans up your engine like new . Carbon build up is not something you can sneez at because it could cause detonation in long term
Senior Member
Joined: Nov 2011
Posts: 333
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From: Sacramento, CA
E350 BT
Yes, the RS4 is one car you don't want out of warranty for that reason, it's fugly inside the heads, but beautiful outside and sounds sweet, but that carbon ... wow!
Senior Member
Joined: Mar 2005
Posts: 437
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Lexus LS 400, 2008 BMW 528i, 2014 e250 BlueTec
This information is a very useful one and I thank you guys again. I just came back from local dealer who told me BlueTec cars shouldn't have to worry about carbon deposit build up until it reaches around 70,000 miles. Anyway, parts guy told me they will carry BG additive product soon. They have seen it work. It happens to be that it is made in USA, not China!
Senior Member
Joined: Nov 2011
Posts: 333
Likes: 1
From: Sacramento, CA
E350 BT
Dipetane has been used successfully for years, although it states it takes up to 6k miles for the carbon to be released, which makes sense, if you have an additive that is strong enough to remove the carbon quickly, it will most likely strip the lubricitiy additive out of the fuel, rapidly increasing wear.
http://www.dipetaneusa.com/index.php
http://www.dipetaneusa.com/index.php
Senior Member
Joined: May 2007
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asdas
