Direct Injection issue?
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Joined: Aug 2012
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From: Fort Worth
2010 C300 Sport
Direct Injection issue?
So is there enough history on the new C-Class direct injection engines to determine any carbon buildup issues? I've read posts on here but cannot come to any conclusions.
I drove an '08 Lexus IS 250 and had slight issues with carbon buildup at just 20k miles. Lexus wanted to rebuild the engine under warranty, not in a sterile factory in Japan but at a local dealership. Of course I balked and traded it in with no apparent discount for the DI issue, luckily. The Lexus dealership had a 2010 C300 Sport with only 10k miles, so I traded in for it last May.
This is my first MB and must say the driving experience is much more stimulating than was the IS 250. I've really enjoyed owning it, and wonder now why I was never able to stray from Lexus until now.
I have considered trading in the C300 for a new C250, but am concerned about the DI given my Lexus experience.
Thoughts?
I drove an '08 Lexus IS 250 and had slight issues with carbon buildup at just 20k miles. Lexus wanted to rebuild the engine under warranty, not in a sterile factory in Japan but at a local dealership. Of course I balked and traded it in with no apparent discount for the DI issue, luckily. The Lexus dealership had a 2010 C300 Sport with only 10k miles, so I traded in for it last May.
This is my first MB and must say the driving experience is much more stimulating than was the IS 250. I've really enjoyed owning it, and wonder now why I was never able to stray from Lexus until now.
I have considered trading in the C300 for a new C250, but am concerned about the DI given my Lexus experience.
Thoughts?
Last edited by frogs9497; Sep 16, 2012 at 10:11 PM.
Super Member
Joined: Apr 2007
Posts: 561
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From: New Mexico
2014 E350, 2012 SL550
This thread covers the topic well:
https://mbworld.org/forums/c-class-w...n-buildup.html
Regards,
Don
https://mbworld.org/forums/c-class-w...n-buildup.html
Regards,
Don
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Joined: Jul 2007
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From: Germantown, MD/Rehoboth Beach, DE
2024 GLS450
I'm well aware of that thread.
Nowhere in that thread talks about the 1.8 Liter having these issues. The recent pics of the 3.5 Liter in there are also not necessarily related to DI intake buildup either (those combustion chambers look like garbage... someone's been running some cheap gas). Every reference to an engine having problems in there has been from another manufacturer.
With the exception of the V12 and 6.2 liter - everything Mercedes that is petrol powered has a DI engine now. I'm confident that if there is a problem, they will find a fix.
Point being, making a statement like
without any evidence isn't helpful to the OP.
The C250 is MB's cash cow - they would be stupid to not support it in the event of any problems.
Nowhere in that thread talks about the 1.8 Liter having these issues. The recent pics of the 3.5 Liter in there are also not necessarily related to DI intake buildup either (those combustion chambers look like garbage... someone's been running some cheap gas). Every reference to an engine having problems in there has been from another manufacturer.
With the exception of the V12 and 6.2 liter - everything Mercedes that is petrol powered has a DI engine now. I'm confident that if there is a problem, they will find a fix.
Point being, making a statement like
Originally Posted by Crippled
stay with the 300, the c250 has some issues with the di also
The C250 is MB's cash cow - they would be stupid to not support it in the event of any problems.
Last edited by MDMercedesGuy; Sep 17, 2012 at 12:14 PM.
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From: Illinois
'08 C300 4Matic Sport, '02 530i
Super Member
Joined: Apr 2007
Posts: 561
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From: New Mexico
2014 E350, 2012 SL550
While the 2.5L isn't part of that thread, the potential problem with the valves is common to any DI engine. Something has to be done to keep the valve tops clean. I assume, perhaps wrongly, that whatever technique MB has decided to use to do this is common across their DI lineup.
I agree that the photos near the end are fuel related problems.
From my perspective, early signs are good that MB will avoid major problems, but the jury is still out on the final verdict.
Regards,
Don
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From: Germantown, MD/Rehoboth Beach, DE
2024 GLS450
I seriously hope that they have things under control - and not just because I own one of the DI cars. It would be another feather in their cap to be the manufacturer who solves what is proving to be a tough problem for all of them to solve.
... now if they could solve the agricultural sound of a DI engine from the outside at low speeds.
... now if they could solve the agricultural sound of a DI engine from the outside at low speeds.
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From: Illinois
'08 C300 4Matic Sport, '02 530i
Thread Starter
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Joined: Aug 2012
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From: Fort Worth
2010 C300 Sport
I seriously hope that they have things under control - and not just because I own one of the DI cars. It would be another feather in their cap to be the manufacturer who solves what is proving to be a tough problem for all of them to solve.
... now if they could solve the agricultural sound of a DI engine from the outside at low speeds.
... now if they could solve the agricultural sound of a DI engine from the outside at low speeds.
Member
Joined: Sep 2012
Posts: 233
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From: Texas Hill Country
2020 AMG GTR
I'm well aware of that thread.
Nowhere in that thread talks about the 1.8 Liter having these issues. The recent pics of the 3.5 Liter in there are also not necessarily related to DI intake buildup either (those combustion chambers look like garbage... someone's been running some cheap gas). Every reference to an engine having problems in there has been from another manufacturer.
With the exception of the V12 and 6.2 liter - everything Mercedes that is petrol powered has a DI engine now. I'm confident that if there is a problem, they will find a fix.
Point being, making a statement like without any evidence isn't helpful to the OP.
The C250 is MB's cash cow - they would be stupid to not support it in the event of any problems.
Nowhere in that thread talks about the 1.8 Liter having these issues. The recent pics of the 3.5 Liter in there are also not necessarily related to DI intake buildup either (those combustion chambers look like garbage... someone's been running some cheap gas). Every reference to an engine having problems in there has been from another manufacturer.
With the exception of the V12 and 6.2 liter - everything Mercedes that is petrol powered has a DI engine now. I'm confident that if there is a problem, they will find a fix.
Point being, making a statement like without any evidence isn't helpful to the OP.
The C250 is MB's cash cow - they would be stupid to not support it in the event of any problems.
