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Old 23-02-2016, 03:52 PM   #1
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Join Date: Feb 2016
Car: ML270
Posts: 1
ML270 Problem starting up and Judder

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?
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Old 23-02-2016, 04:01 PM   #2
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Join Date: Aug 2012
Location: Finland
Car: W211, W210
Posts: 963
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).
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Old 14-03-2016, 01:17 AM   #3
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Location: Knaresborough,North Yorks
Car: W163 ML270 Inspiration, Leon Cupra TDI
Posts: 147
+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.
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Old 06-12-2016, 01:40 PM   #4
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Car: ml 270 cdi 02
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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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Old 11-12-2016, 12:14 PM   #5
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Location: Lancs
Car: C250TD Sport
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Did you change the seals in the low pressure pump?

Does it idle ok when started?
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judder, ml270, problem, starting

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