ML320 ECU random misfire!!!

ghmd

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Sep 8, 2009
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Your Mercedes
ML320
Please help, my W reg ML320 is badly misfiring! It has been going on for months, I pull away and it goes into limp mode. I turn it off and the problem sometimes clears. On over-taking, it sometimes loses powere and this morning i nearly had an accident. We replaced the oxygen sensor and the problem still happens. I took it to the garage and the diagnostic was 'ECU random misfire'!
We replaced the MAF sensor and it improved for a while but now it is bad again. It is worse in damp and cold conditions. It is driving me nuts!! Please help!:(
 

WG M-B

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Dec 5, 2010
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Location
North west london
Your Mercedes
C63 Wagon in black
Can it not go on star to be checked by somebody???
 

jibcl500

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Oct 22, 2005
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Age
56
Location
Cambridgeshire
Your Mercedes
CL500,ML55,SLK280
Could be anything but unless it goes on star diagnostics your p!$$ing in the wind sunshine.

Coil packs?
plugs?
HT leads?
cats blocked?
O2 sensors?

Any dash lights?

jib
 

jibcl500

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Location
Cambridgeshire
Your Mercedes
CL500,ML55,SLK280
Your also not that far from me so if the ML can get here I can do a free yes free star diags for you, I also have a great many spare parts for the 320 so if we need something I should have it.

jib
 
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ghmd

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Your Mercedes
ML320
  • Thread Starter
  • Thread starter
  • #6
Where are you? What is star? No dash lights
 
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