w209 320 Petrol - stalling issue

manzana

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Jan 7, 2016
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North East
Your Mercedes
CLK/2002/320
Hi all,

I got a 2002 CLK320 and it has an issue with stalling when starting cold. It also sporadically stalled driving on the motorway with the same symptoms.
The engine starts but it dies off when started from cold and being unused for a day or two. After repeated trials (3 up to 15 sometimes) it finally will keep rotating. When stalling on the motorway it needed a few trials as well to make it run again.
As seen in video:
https://youtu.be/M_xyv_Yrtto
[YOUTUBE]https://youtu.be/M_xyv_Yrtto[/YOUTUBE]

OBD reader gives a code P0403 and I had the mechanic replace the EGR valve but the code and the problem remains unfortunately. I am unsure whether he cleaned up the EGR tube hovewer. Also the MAF sensor has been cleaned too.

Could anyone please give me any ideas what could be the problem from the symptoms? Is there a point in investigating further the EGR (checking wires and tube) or do symptoms point towards other issues?

Thank you!
 
Last edited:

mattkh

Senior Member
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Aug 2, 2006
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Location
England
Your Mercedes
A160 W168 1999 1.6
Hi
Did the mechanic clean/replace any vacuum pipes ?
 

Stability

Senior Member
Joined
Jan 11, 2014
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UK
Your Mercedes
Mercedes
Crankshaft position sensor is worth a try
 

television

Always remembered RIP
Joined
Mar 14, 2005
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Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
Could be CPS but reverse symptoms, is this the car with the 272 engine,
 


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