When I was driving in heavy rain, the check engine light went on.
The car runs normal, steady idle, good acceleration...
I have read that for the older W124-model water might have corroded the 02
sensor and that cleaning it would solve the problem. Could this also happen
with the W210? And where would I find the O2 sensor in this model?
I also checked the fuel cap, but this seems to sit tight. I suspect water
got in somehow, since the light went on right after I drove through a deep
Also is there a way to read out the error codes at the car directly?
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