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Old 11-23-2009, 01:24 PM
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Join Date: Nov 2009
Posts: 1
Injection Failure

'07 ML 320 CDI. Experienced a failure in the fuel injection system at 40,000 miles. Repaired by local Mercedes dealer but I am not sure exactly what repair work was done. Now 2,000 miles later just experienced the same problem. Does anyone have suggestions on what I should ask or request of the service department? Something is wrong beyond the original repair to have failed again in only 2,000 miles. Thanks.
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Old 11-23-2009, 01:58 PM
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Join Date: Feb 2004
Location: Walnut Creek, CA & 1,150 miles S of Key West
Posts: 4,874
Ask for a copy of the prior work order so you know what work was done....
Terry Allison
N. Calif. & S. of Key West

09' E320 Bluetec 77k
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Old 11-23-2009, 04:09 PM
Biodiesel300TD's Avatar
Join Date: Dec 2004
Location: Albany, OR
Posts: 4,845
Have you been running any biodiesel, if so what blends? I believe the newer common rail diesels are much more tempremental about the fuel viscosity.
'04 Jetta TDI Wagon
'82 300TD ~ Winnie ~ Sold
'77 300D ~ Sold
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Old 11-23-2009, 11:11 PM
Join Date: Oct 2006
Location: SoCal
Posts: 60
Once again

Mo money, mo tech, mo mpg, mo problems.
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Old 11-23-2009, 11:37 PM
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Join Date: Sep 2007
Location: Long Beach,CA
Posts: 25,126
My understanding is that the Common Rail System has much finer filtration than the older models. This could also mean that the Filters plug up easier.

I would try changing the filter/s first.
84 300D, 82 Volvo 244Gl Diesel
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Old 11-24-2009, 10:14 AM
C Sean Watts's Avatar
Join Date: Mar 2006
Location: NC
Posts: 1,318
With one post

and a vague "failure in the injection system" I won't hold out for a detailed story...BUT DDBISHO if you are still following this thread,

Please be more specific about what failed the first time and what failed now. I was surprised to learn there are fewer parts in the CDIs than in the indirect or direct/element systems. I did the classroom course on them but very little beyond that.

Also, did you EVER put in any vegetable oil/SVO/WVO or biodiesel?
1987 300D (230,000 mi on a #14 head-watching the temp gauge and keeping the ghost in the machine)
Raleigh NC - Home of deep fried sushi!
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