Mercedes-Benz 400E Repair and Maintenance
A guide to problems, costs, maintenance and repair for your Mercedes-Benz 400E
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Mercedes-Benz 400E ProblemsErratic Engine Operation and Poor Fuel Economy Due to Faulty Mass Air Flow Sensor
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 volume of fuel to the cylinders.
Ports in the cylinder head related to the emissions air injection and EGR systems can clog; the cylinder head should be removed and the ports cleaned.
A vibration felt through the center floor of the vehicle can be caused by cracked and/or shredded driveshaft flex discs, resulting in excessive driveshaft movement. If not repaired, damage to the driveshaft center support bearing, transmission, or differential can occur.
Mercedes-Benz 400E QuestionsWhat is kit number for electronic connector module? (1 answer)
Without holding the switch down to close and turn the key on and off