1994 Mercedes-Benz E420 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1994 Mercedes-Benz E420
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1994 Mercedes-Benz E420 ProblemsEmissions-related ports in cylinder head may clog
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 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 volumes of fuel to the cylinders.
The lower control arm bushings can wear and crack, resulting excessive movement at the control arm pivot point, leading to irregular and premature tire wear. Worn Ball joints can also cause similar tire wear symptoms. I some cases it may be necessary to replace the lower control arm, including bushings & ball joint to correct this concern.
1994 Mercedes-Benz E420 QuestionsIs there way I can check why my car won't intake no fuel??? Need help (1 answer)
It turns over but it sounds like it's not taking any fuel...
Can we do it ourselves?
What is the cost?
What happens if we don't fix it.