Mike, Don't know if this will help but... I had/have the same
problem with my 6.5 diesel in the Chevy van. Doesn't happen in
the winter but starts in the spring and summer down here in Fla.
Didn't happen all the time either. I finally came to the
conclusion that it had to do with the fuel and where I bought it.
I think that some fuels have a lot more light volatiles in them
and so when you shut the motor off the heat under the hood will
cause a vapor lock condition in the injection pipes. The support
in your case is that when you bleed the line the vapors come out
and the engine starts right off. Same happens if you wait long
enough for everything to cool and the vapors to turn back to a
liquid. The proof is to leave the hood open after you stop the
engine and come back an hour or so later and see if it starts
without any problems. At least that seems to have worked for me
on the van. It's too hard to get to the injector lines to bleed
them so I haven't tried that though I may do that some time just
to see if that works on the 6.5
Manfred
Mike Esh
Sent: Friday, June 11, 2010 3:28 PM
To: Mercedes Discussion List
Subject: Re: [MBZ] Hard start problem returns
Car runs great! Cruises at 75 mph easily. In-line has one small
bubble
in it, and it does not seem to be pumping a stream of bubbles.
Mike
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