Hi I have the van above, when the reserve fuel light is on it runs fine, however when i fill it up past reserve with diesel it starts smoking intermittently. SOMETIMES turning the engine off and back on resolves this. The smoke is white and comes from the exhaust. It smells like unburnt diesel. the van has covered approx 180 000 miles.

 

The exhaust was stolen about 4 years ago and replaced by the insurance company for a copy. The ecu was causing problems and was changed from someone who claimed to be a mercedes specialist, i feel like he charged me for a new one but put a second hand one in. The van had been running ok after replacement of ecu too about two years ago.  

Comments

Profile picture for user MercedesMedic

OK first that's a strange issue. Is your check engine light on? This may be a fuel related issue  I would do a fuel pressure test when you experience the problem. Keep up updated on how it goes. 

Profile picture for user Mani1981

No engine check light is on, can you recommend a pressure test kit? I am not a mechanic but a machine shop engineer so an expensive one would be pointless but something to give me usable readings?

Profile picture for user MercedesMedic

Go on any of the main retailers website and search "Pressure test kit with schrader valve" You will find a few in the $30-$50 range.

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