ML270 Problem starting up and Judder

rexmundo

New Member
Joined
Feb 23, 2016
Messages
1
Car
ML270
Hi, got a problem with my other half's Ml270 and would appreciate some help.

All of a sudden couple of days ago it wouldn't start in the morning. Well it starts fine but cuts out after 4-5 seconds. I managed to get it going by taking it straight to high revs but when in low speed/idle it judders and makes funny squeeky noise. Took it to garage and they changed EGR. But it didn't fix anything. Did it again next morning.

Thinking of changing manifold but thats a 1k job and don't want to do it for nothing. There are no other error codes other than the EGR error code.

Anyone has ideas on what could be wrong?
 

mersum1es

MB Enthusiast
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Aug 9, 2012
Messages
1,370
Location
Finland
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W212, C219, W220
Usually these are fuel related problems... air draw, injector leak, pressure control valve...

But, you say EGR fault is still there? Read by star device?

Check EGR vacuum control device (you may swap it with similar turbo controller, follow vacuum lines from EGR and turbo actuators, slightly larger than match box...). Also EGR fault may be triggered other fault in boost line (a leak somewhere like boots pipes, cooler) or turbo fault (see if turbo control arm moves when revving stationary).
 

MOZ

Active Member
Joined
Sep 3, 2014
Messages
146
Location
Knaresborough,North Yorks
Car
W163 ML270 Inspiration, Leon Cupra TDI
+1 for potential fueling issue, very common on these. Air gets into the fuel lines and can take a lot of cranking to start and sometimes cuts out after starting dependent on leak.
Do a search for ml270 fuel lines or poor starting, there will be loads of info ( could do a search on my posts as I've posted a lot in this issue ) worth looking at and trying( a few quid less than £10 for o rings which may be all you need, or £30 to £50 worth of new fuel lines( merc parts moulded) before looking at inlet manifold for 1k.
 

osbournedwight

New Member
Joined
Dec 2, 2016
Messages
6
Car
ml 270 cdi 02
My ml 270 cdi don't want to start up in the morning i install a feul pump and it still doesn't fix my problem i have to put my foot and the gas pedal to get it to start up can anyone tell me what is going on with it please my name is dwight ta

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91dm

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Joined
Oct 6, 2010
Messages
866
Location
Irl / Uk
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A few
Did you change the seals in the low pressure pump?

Does it idle ok when started?
 

piet-venter

New Member
Joined
Apr 17, 2017
Messages
5
Car
2003 Mercedes-Benz C 270 CDI
I had the same on mine. One of the plugs on top of the injector kept coming loose. I tighten it an never had the problem again.

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piet-venter

New Member
Joined
Apr 17, 2017
Messages
5
Car
2003 Mercedes-Benz C 270 CDI
My car also just cut out while driving then won't start again. After tightening the plug on the injectors never had the problem again

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JohnDavies

Active Member
Joined
Feb 28, 2017
Messages
131
Location
Ripon, N. Yorkshire
Car
ML270cdti & C200 Coupe
Had the same problem as the threadstarter.
1/ I had a cracked washer on one injector so changed them all. (washers not injectors)
2/ Changed all the fuel line 'O' rings incl. the pump

I have had no problems since.

Note: When the work is completed make sure your Batt. is fully charged to pull the fuel up.
 

JohnDavies

Active Member
Joined
Feb 28, 2017
Messages
131
Location
Ripon, N. Yorkshire
Car
ML270cdti & C200 Coupe
Had the same problem as the threadstarter.
1/ I had a cracked washer on one injector so changed them all. (washers not injectors)
2/ Changed all the fuel line 'O' rings incl. the pump

I have had no problems since.

Note: When the work is completed make sure your Batt. is fully charged to pull the fuel up.

I should have put, changed all the fuel line 'O' rings incl. the pump 'O' rings. ( not change the pump). Apologies for any confusion.:wallbash:
 

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