Mercedes Benz E320 owners have reported 1 problem related to mass air flow sensor (under the electrical system category). The most recently reported issues are listed below.
The car began to idle rough months before, it completely stopped. I thought this was just a mass airflow sensor, but after getting that fixed I didn't know what it was. A few months later, the car stopped in the middle of the road. It could have ended in a crash but thankfully I was on a road with fairly light traffic. Upon inspection, the wiring harness on my '95 E320 completely was wearing away, specifically around the ignition coils. I'm ashamed of mercedes for not recalling this problem, as it (I have found out after reading) is an infamous problem with mb from 1993-96. I hope that they sort this out so no one gets in a crash, or worse.