2004 C230K Sport Coupe 1.8l HELP, my ck engine light came on and I had the 02 sensor (Intake) replaced. My tech had shown me some oil on electric connector. I heard about problems with oil leaking from cam on harness and having to replace it. After my new sensor was installed two weeks later same exact fault. We cleaned the contacts and ran the STAR computer to diagnos and reset. There was suppose to have been a TBS on this oil/electrical issue with sensor. Can anybody give me some info??? Please.

Thanks, BIP