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Q: After replacing after market engine air filter cel for PO101 appear on 2003 Mercedes-Benz S430 4MATIC

Clean MAF sensor light still on, whill a aftermarket filter will throw the light?
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Something may have been disturber when replacing filter, try cleaning air mass meter contacts. was the previous filter a k&n, have seen the oil from those get on air mass and cause it to fail.

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