1997 Mercedes-Benz S420 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1997 Mercedes-Benz S420
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1997 Mercedes-Benz S420 ProblemsFaulty Mass Air Flow Sensor Causing Erratic Engine Operation and Poor Fuel Economy
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 engine wiring can degrade because the insulating material falls off leaving the bare wire exposed. This can cause many problems depending on which wires are exposed and what they touch.
Problems with the pneumatic system can cause closing assist and door lock issues.
1997 Mercedes-Benz S420 QuestionsMy 2 side air vents blow hot air when a/c is on while center vents blow cold. (1 answer)
How ca I fix this to get cold air out the side vents. I checked the fuses and they are good. Even when weather is cold they still blow hot air so is not a vent flow problem.
For getting the drivers door panel off to gain access to the window regulator?
im trying to find the easiest way to remove and replace the hood hinges after a hood blow off