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Q: My "check engine" light just came on but the diagnostics says No Malfunction? on 2000 Mercedes-Benz S430

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I do not have a manual. I did check oil level and appears OK. Pleae advise. Thanks!
(2) Answers
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Scan for trouble codes using a professional grade scan tool have trouble codes stored, pending codes and "freeze frame" information printed so the trouble codes can be properly diagnosed.
What diagnostics? Find someone who has a diagnostic tool that can read data on the enhanced side of the PCM not just a generic OB2 code reader.
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