I drive a Mercedes-Benz C 220. The 'Check Engine Light' came on a few days ago, and after checking all items that should or could be the cause, I'm of the notion that it must have been electronically triggered by the fact that the car just rolled over 101,000 miles. Can anybody give me list of those items that will trigger it, and once all items are checked and/or corrected, can you tell me where the 'reset' button is (or whatever other method may be used to reset it)?
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The check engine light does not come on simply because the engine rolled past 100 k miles .This light has been set off cause the computer has picked up an issue with any one of a number sensors (or its circuit) which monitors the way the engine is performing . and there are a lot of them , so it really needs to checked out to avoid replacing unnecessary components which can get very costly .
The CEL (check engine light) doesn't care what the odometer reads.
There are a large number of parameters that can trigger the CEL and trust me, you didn't even come close to "checking all items that should or could be the cause". Did you, for example, check the charcoal cannister shut-off valve? Did you check both O2 sensors? Did you check the MAF (mass air flow) sensor?
There is no such thing as a 'reset' button. The codes have to be erased with a scanner.
Mercedes Benz C Class 220
Not sure how you got that "notion". The light got nothing to do with your mileage. Bring it in for a scan and find out the problem. It is most likely the oxygen sensor