Check engine light will not turn on but all the sensor lights come on.
What makes this problem better or worse?
Nothing
How long has your 1998 Mercedes-Benz S320 had this problem?
Don’t know. Car runs perfectly; did not realize problem until had a smog test and although it passed, was told that the check engine light will no turn on, however all the sensor lights turns on and turns off as soon as the engine is started.
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