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.
Erratic Engine Operation and Poor Fuel Economy Due to Faulty Mass Air Flow Sensor on Mercedes-Benz SL320
Average mileage: 98,000 (98,000–98,000)
5 people reported this problem
1 person shared problem details
Runs rough at idle mostly and uses huge amounts of fuel all of the time
Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inope...
nothing happens...just need to know where to locate fuel filter on my car!
Found Leaking vacuum hoses, replaced them..replaced the fuel pressure regulator
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