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Discussion Starter · #1 ·
Hi folks,

A few months ago I purchased a w211 E200 CDI (year 2003, sedan) with automatigóc transmission. After 250kms, the engine started to shake and black smoke come out from the exhaust muffler. The rpm fluctuates at idle. When I rised the rpm the engine started to run smooth but the black smoke still was. There is no engine code, nothing. I replaced the air and fuel filter. Four injector have been removed for inspection. There was no any signs of deftect. I have cleaned them with ultrasonic cleaner. After re-assimbling of injectors I put all back to their place with new gasket. I haven't experienced any improvement. Where should I continue the inspection? EGR valve? Turbo or something else?

I am awaiting for your quick response!

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