Hello,

Can any of the techs let me know on a 1999 C280 which sensors correspond to which locations? I know there are four sensors. In particular which "bank" is which, and which sensor is which? I have a faulty Bank2, Sensor 2, but don't want to just guess. I believe it is the after cat one on the right. Also, do these numbers correspond with the same locations on different models?

Thanks,
Chris

NORMALLY bank # 1 is the one with # 1 cylinder.
And yes, # 1 is the pre-cat O2 sensor, and # 2 the post cat sensor.

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2007 C 230 Sport.