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 Problems

Bad Switch/Blower Motor Resistor Assembly May Cause Inoperative Heater Blower Motor

Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.

Poor AC Performance Due to Refrigerant Loss

A refrigerant leak may develop from one or more of the following AC components: AC compressor, hose manifold for the compressor, or the evaporator core. The loss of refrigerant can cause poor AC performance. Our technicians tell us that proper leak diagnoses should be performed in order to determine the cause of any refrigerant loss.

Emissions-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.

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1997 Mercedes-Benz S420 Questions

My 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.

What is the procedure? (1 answer)

For getting the drivers door panel off to gain access to the window regulator?

how to replace hood hinges (2 answers)

im trying to find the easiest way to remove and replace the hood hinges after a hood blow off

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