Inactive-Merged-Faulty Mass Air Flow Sensor Causing Erratic Engine Operation and Poor Fuel Economy on Mercedes-Benz SL600

Submitted by Vehicle Owner · May 29, 2025
Published by RepairPal

Problem overview

A faulty mass air flow (MAF) sensor can cause erratic/rough engine operation and fuel economy issues. Since this sensor measures the actual amount of air entering the motor, when it fails, the engine control module (ECM) takes the wrong information and delivers incorrect volumes of fuel to the cylinders.

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