Question about 2003 Mercedes-Benz C-Class

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C200 Emission Problems

Hi, I have a 2003 Merc C200. The emissions are really high but my mechanic is convinced that it is not the CAT but an electrical problem. We have replaced the front oxygen sensor and the temperature unit but to no avail. He says that the CO levels are too high for it to be a CAT problem. He has put through a few petrol washes to clear the engine of any debris that may have built up, but still too high. Any suggestions would be greatly appreciated.

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Hello,good day,they already replaced some parts,but same problem,better to send your car to a dealer to diagnose with proper tester,they can evaluate your engine condition for emission test,also ask if you can get a copy of record,specially fault code,freeze frame data criteria,can be presented to emission officer,ty

Posted on May 12, 2009

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Posted on Jan 02, 2017

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