Repeatedly failing smog test

  • 2001 MERCEDES BENZ C320
  • 6 CYL
  • 4WD
  • 100,000 MILES

I recently purchase a used car, but it is constantly failing emission tests. The catalyst and oxygen sensor constantly give reports of "not ready." A mechanic already suggested that I replace a defective oxygen sensor (which I did), but I continue to get the same two errors. I have also had issues with the battery constantly being drained. Any input would be appreciated.

Do you
have the same problem?
Sunday, January 23rd, 2011 AT 7:36 PM

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