ML270 CDI Help?

[MercFox]

Hi i'm new here, having a bit of trouble with my Merc, having just replaced the fuel filter and supply pipe on my Merc, I am now unable to start it, it cranks fine, battery is good, replaced glow plugs, is this system self bleed or is there a knack of doing it? I have noticed what appears to be a small plunger on top of the engine that is connected to that pipe but can't understand how it works as it doesn't appear to move, any ideas? Sorry for my first post to be technical issues but I need this fixed quite urgent, Thanks a lot

 

[Cole@MBS]

welcome to the site, as with any cdi lump, crank the death out of it, it will self bled, but you have to keep it going to bleed!!!

 

[Xtractorfan]

The way to do it is to fill up the fuel filter bowl with clean diesel /paraffin even to get the motor running, it can take a bit of cranking to get the fuel up to the filter.. not sure about the plunger on an ML..

 

[television]

As Xtractorfan above, you must fill up the filter bowl

 

[kebo57]

Hi MercFox welcome to the site
2-3 min's at least if you havent filled the fuel filter
that plunger is nothing to to with the bleeding

now you going to ask so what does it do then
I dont know that either

Kevin

 

[MercFox]

ml270cdi

Thanks for all your help, done all of the above today but still no joy, now loosing the battery, i suspect there is a underling prob here as there is no diesel coming down the line at all , going to try sucking on the line with a syphon ,see if that works

 

[Cole@MBS]

You have to crank it to death, can take a min of cranking before it will start, if theres no other faults it will start!!!

 

[Ellsy Tanners]

You have to crank it to death, can take a min of cranking before it will start, if theres no other faults it will start!!!

I have to say I slightly disagree with this. It does the starters no good at all being cranked for long periods of time. My advise would be fill the filter, then crank for 20 seconds max. wait a min and repeat untill it starts.

Its up to you put I think thats why so may starter fail in later life IMO.

 

[television]

It also sounds to me as though the battery needs a charge.

Once the battery is low the engine turns slower, and the cranking amps rise.

When you have charged the battery,,just spin the starter non stop until the fuel comes through, every time you stop the fuel runs back

 

[Xtractorfan]

Im with Ellsy on this.. and Im kinda surprised MB dont have a manual pump to alleviate the cranking.. Serviced 3 of our own cars last week, BMW525d, clio diesel,and my own S320CDI topped up the filters before sealing them up and every car started first go and ran perfectly.. .. Mercfox you sure the filter sealing ring is properly fitted, they can be a bitch if you aint careful.. which pipe did u replace? the one before or after the filter?

 

[Cole@MBS]

The way to do it is to fill up the fuel filter bowl with clean diesel /paraffin even to get the motor running, it can take a bit of cranking to get the fuel up to the filter.. not sure about the plunger on an ML..

I would think the chap is talking about the fuel pressure test blanking point!!! item number 222!
http://www.detali.ru/cat/oem_mb2.as...GM=716.644&CT=M&cat=21T&SID=07&SGR=120&SGN=03