108d wont start - Mercedes-Benz Forum
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#1 (permalink) Old 08-27-2014, 12:52 AM
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Vehicle: 1999 vito 108d
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108d wont start

My 108d has been stood for one year whie i was tidying it up ready for a camper conversion.I unpluged the battery while it stood, when to start it last week and it started first turn to my suprize.
This week i changed the fuel filter and pre fuel filter, i thought it would take a few turns to start, with the fuel filter having to fill up,but it wont start.
Battery goes dead after 5 or 6 goes and it has tried to fire a few times with no joy.
I have charged the battery up a couple of times and tried again to no joy. Perhaps i need a new battery now, just lost on how it started first turn to this after fuel filters been changed.
Any ideas please, dont wont to do anuthing else until its running again.Thanks
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#2 (permalink) Old 08-28-2014, 12:45 AM
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They do not self prime, been there, tried this, killed starter motor........ LOL

What you need to do is take the FRONT pipe off the black one way valve on the filter, and get a long length of clear tubing, put this on the black one way valve stub, then suck like fuck until you get clear diesel with no air

i.e. the system including filter is completely full of diesel................

Then put the hose back on the one way valve, crank it for 5 - 10 seconds and it will fire up

HTH,

Cheers Dave
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#3 (permalink) Old 08-28-2014, 01:22 AM
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Thanks for replie, little lost to which one you are on about. If you look at the fuel filter from front of van you have 3 fuel lines in a row plus another fuel line at the rear going to the prefilter.
There is also another fuel line lower down on the fuel filter where the 3rd top line is.Are you on about the very first fuel line at the top.Thanks
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#4 (permalink) Old 08-28-2014, 01:26 AM
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Hi I'm new to this but i had a similar problem mechanic had no clue about Mercedes and cost me 200 quid more than it should have to get sorted. The fuel filter must be full of diesel if their is no diesel in the fuel filter it will not start it must be full. Make sure their is no air lock in the pipe it will start.
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#5 (permalink) Old 08-28-2014, 01:31 AM
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This is a photo
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#6 (permalink) Old 08-28-2014, 01:38 AM
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Strange has the mercedes worshop manual says to bleed filter allow engine to run for 1 minute at approx 1500rpm.The fuel filter is bled automatically.
Thats not the case, just need to no which valve you are on about.Thanks
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#7 (permalink) Old 08-28-2014, 10:47 AM
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ah lads thats a 108 D not a cdi. fill up the filter and wait a few mins then top up to the brim if needed. re fit then crank and bleed the injectors. do this by cranking with a helper and crack open the inj nuts 1 at a time. air comes out. repeat at all injs until you only get diesel out. it should be firing pretty soon then. google inj bleeding if you need to for video ev0dencei
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#8 (permalink) Old 08-28-2014, 12:53 PM
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Many thanks, think i will wait till i get a new battery first,then give it a go.Many thanks.
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#9 (permalink) Old 08-28-2014, 02:34 PM
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No hassle. like that i keep getting caught where i assume that everyone has a cdi when i see 108 etc. Have fun bleeding them its very rewarding when little by little the engine starts to fire
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#10 (permalink) Old 08-29-2014, 12:22 AM
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Many thanks again. I brought the peter russek pocket mechanic book for the 108d, funny how that is wrong too and says they are self bleeding.
Do u need to fill the fuel filter up, or will just cracking injectors open be enough.Just thought of saving me buying a fuel can to get some spare fuel to fill it.Thanks
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