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hmm... I apologize for my ignorance, but do older pre 92 w124s with the m103 engines have such a sophisticated ECU that they can store the dates and put out engine codes? I don't know, I just have never seen anyone hook up a code scanner to an m103.
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No, the 103 engine management was not sophisticated enough to store dates or number of occurances. OBD scanners are useless also.