Check Engine Light On Due to Failed Mass Air Flow Sensor on Mercedes-Benz SLK230

The mass air flow sensor can fail, resulting in poor fuel economy and Check Engine Light illumination.

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Average mileage: 90,933 (44,000–190,347)
7 model years affected: 1998, 1999, 2000, 2001, more2002, 2003, 2004
20 people reported this problem
10 people shared problem details
Check Engine Light and Fuel Trim and sensor circuit issues.
check engine light on . replaced mass airflow sensor 2 times . still have same fault.
I replaced the Mass Air Flow Sensor, not a hard fix, you can do it yourself, no need to pay the high dealer price.
Check Engine light is on due to the mass air filter.
Replace MAF. This will be the 3rd time at 124K.
The check engine light has been a problem from airflow. I have just tolerated it
Actually was on way to get vehicle smogged and check engine light came on...therefore could not smog. Took car to shop. They ran test and found downsteam 02 sensor out of limits. replaced to the tune of approx. $616.00, $260.00 was labor, rest part. Still not sure if will pass smog. I have to drive 150 miles to reset computer info before it can be smogged. These sites may be helpful...or maybe not...
check engine light on, wouldnt pass smog test, misfiring, replaced mass air flow sensor, part alone was 450.00
Check engine light. dealer verified Mass Air Flow sensor failed
Running rough, engine light came on.
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