your e 320 fuel injection computer has the ability to modify the mixture by 30% in either direction.this is called adaptions by mercedes.your cel is probably coming on because it has adapted to the limit[either rich or lean].until you replace the maf this may be an ongoing experience.

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David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
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