Replace air filter when replacing failed mass air flow sensor on Mercedes-Benz E500 4MATIC

The mass air flow sensor tends to fail causing poor fuel economy and Check Engine light illumination. The engine air filter should be replaced when the mass air flow sensor is replaced; a dirty filter can allow debris to damage the new sensor.

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Average mileage: (–)
2 model years affected: 2005, 2006
2 people reported this problem
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