My Mercedes engine light came on and I used my OB and it is throwing a Po300, PO171 and a PO174. What do those codes mean?

Asked by RunOut Aug 05, 2013 at 08:27 AM about the 2003 Mercedes-Benz S-Class S 500

Question type: Maintenance & Repair

Just trying to find out what the codes mean and what I can do to fix.  Basically the car runs really good.  It kinda of misses or is rough when cold but that changes when warms up.

3 Answers

RunOut answered 11 years ago

Thank you very much for your help. I am always dumbfounded sometimes at the different replies people give you. I had a mobile mechanic tell me that all I need was a coil. Your answer sounds more correct. Thanks again, Mr. Cloyd

Mark helpful
545

Joe answered 10 years ago

Maybe the time to change AIR FLOW MITER Sensor, Make sure its not for eBay or cheap from China. Try to get original one.

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