How to Fix the Air Flow Sensor Meter on a 300E


1. Pop the hood of your Mrcedes 300-E and remove the negative battery cable with a wrench or socket set.
2. Find the MAF sensor meter on your Mercedes. It is located between the intake manifold and the air filter.
3. Take off the two mounting bolts holding the MAF sensor in place and pull it free. Remove the plastic wiring harness from the back of the MAF sensor and plug it into the back of the new sensor.
4. Set the new sensor in place and tighten it down with its mounting bolts.
5. Replace your 300-E's negative battery cable.