Erratic Engine Operation and Poor Fuel Economy Due to Faulty Mass Air Flow Sensor on Mercedes-Benz 500SL

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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Average mileage: 59,950 (59,950–59,950)
4 model years affected: 1990, 1991, 1992, 1993 more
5 people reported this problem
0 people shared problem details
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runs strong,occasional rough idle and hard starting

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