Mercedes Benz

******************************************************************** 2010 Mercedes Benz E 63 AMG Sedan (212.077) V8-6.3L (156.985) Copyright ? 2013, ALLDATA 10.52SS Page 1 Vehicle: All Technical Service Bulletins MAF Sensor/Self-Adaptation of Mixture Formation MAF sensor and self-adaptation of mixture formation trouble-shooting diagram Repair process for fault code P2004-[ ] Functional description of the MAF sensor: Upon engine start, a current is passed through the MAF sensor, heating the wire film to a certain temperature. As air passes through the sensor, this film is cooled and the sensor determines how much electricity is required to keep the film up to temperature. This enables the sensor to determine how much air (in weight) is passing through the sensor at any given moment. This signal is then sent to the ECU which it compares to a preprogrammed map to deliver fuel and ignition spark, taking into account other engine inputs such as engine RPM and temperatu...