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Old 01-14-2000, 11:15 PM
Posts: n/a
It sounds like an O2 sensor to me, also. That was the only input that would turn the check engine light on and off at times other than a possibly faulty CIS-E (fuel computer) control unit, but that is very rare. I would suggest using a factory Mercedes-Benz O2 sensor for best results. Good Luck!

Jim LaPlant
Factory Trained Mercedes-Benz Technician
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