Question about 2004 Mercedes-Benz C-Class
Faults for upstream o2 sensors are usually caused by vacuum system leaks before your mass air flow meter. that type of leak will tell the computer to add more fuel because it is reading more air when you really don't need it look for a rip in you boot from air box or that general area that would be the root issue. hopefully. good luck
Posted on Sep 29, 2009
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Posted on Jan 02, 2017
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