O2 sensor light in 85 380SL

[Southin]

My O2 sensor light remains lit despite normal readings from the sensor itself. The nearby MB dealer could offer no explanation, except to "suggest" that there may be a fault in the car's computer, which would be a major expense to replace. When having minor service performed by a local foreign car specialist, I mentioned this problem to him and he researched it on ALLDATA. After explaining that an illuminated sensor light means that the O2 sensor requires service (no surprise there!), ALLDATA goes on the state, and I quote exactly: "After the necessary service is completed, remove the oxygen sensor light bulb." This seems a somewhat...well, low-tech solution, and also raises the question of how you know the sensor is properly functioning in the future. For the time being, I have adopted the ALLDATA solution, but wonder if it is the correct one and if that is what everyone does.