Hi,
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 puddle. Also is there a way to read out the error codes at the car directly?
thanks,
FD