Replace air filter when replacing failed mass air flow sensor on Mercedes-Benz E430

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: 40,000 (40,000–40,000)
5 model years affected: 1998, 1999, 2000, 2001, more2002
7 people reported this problem
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problem details
2001 Mercedes-Benz E430 40,000 mi,
check engine light MAF sensor failure, dirty air filter, replaced cleared codes, problem solved Mercedes Dealer serviced car, did not replace air filter, though regularly serviced there!!