slk 230 engine missfiring

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giz - 05 Mar 2007 07:29 GMT

just purchased an slk 230 1998,car is missfiring when cold,coughs and
splutters when cold,and also when triing to give full throttle,i
cleaned airflow meter this helped when engine is heated up,there was a
fair amount of wet oil in airflow meter,still missfires when cold,also
doesn,t seem to pick-up speed very fast,it revs fine but doesnt shift
gear seems to hang onto revs,anybody had similar problems thanks giz.

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Tiger - 05 Mar 2007 17:32 GMT

I am not sure if you have individual coil for each plugs... if so, probably
oil in the hole where spark plugs are.

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sherlock - 16 Mar 2007 05:32 GMT

mine had an oil leak on the camshaft actuator that caused oil in the
airflow meter. oil entered the wiring loom and spread throughout the
loom till it came out of the ecu and oxygen sensor, causing oxygen
sensor fault codes and rough running.
needed parts
a1110510177 magnet
a2711502733 starter line (modified wiring loom to prevent future
reoccurance)
wiring loom required flushing out
all done by mercedes, cost £560
then required oxygen sensor due to oil contamination
£18

> just purchased an slk 230 1998,car is missfiring when
> cold,coughs and splutters when cold,and also when triing to
[quoted text clipped - 4 lines]
> seems to hang onto revs,anybody had similar problems thanks
> giz. :?

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Steve K - 18 Apr 2007 13:59 GMT

> mine had an oil leak on the camshaft actuator that caused oil in the
> airflow meter. oil entered the wiring loom and spread throughout the
[quoted text clipped - 17 lines]
> > seems to hang onto revs,anybody had similar problems thanks
> > giz. :?

Hi, My 2001 230SLK -65k miles just had a report from Mercedes Pentagon
Southamptom England following service why engine warning light is on
and fault is same as Sherlock
with oil contamination of Lambda sensor causes by oil through loom
from actuator.

Similar cost quoted to rectify incl new engine loom but not had the
work done as investigating further
Car runs OK still with warning light on but do not know the longer
term effect - it did pass emission just
Anyone else had the same problem and got anywhere with a concession.

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