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1997 Mercedes-Benz S420 Repair and Maintenance Costs

A guide to repairs, service, and maintenance costs for your 1997 Mercedes-Benz S420

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1997 Mercedes-Benz S420 Problems

Closing Assist/Door Lock Issues Due to Pneumatic System Problems

Problems with the pneumatic system can cause closing assist and door lock issues.

Power Window May Fail Due to Window Regulator

One or more door windows may stop working due to a failed window regulator. Replacement of the failed regulator will be necessary to correct this concern.

Erratic 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 volumes of fuel to the cylinders.

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1997 Mercedes-Benz S420 Questions

Driver side headlight won't turn off (1 answer)

The driver side light stays on even if the car is off

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?

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