2003 Mercedes-Benz S430 4MATIC Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 Mercedes-Benz S430 4MATIC
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2003 Mercedes-Benz S430 4MATIC ProblemsAirmatic Pump Motor May Fail Due to Sticking Relay
The relay which turns the airmatic suspension pump on may fail causing the pump to run continuously. This can result in failure of the pump motor or a dead battery as the pump motor will continue to run after the car is turned off. Also, Worn airmatic pump mount bushings can causes noises in the front axle while driving on bumpy roads or a buzzing noise while the pump is running.
High mileage or older vehicles commonly develop leaks from the differential seals and/or cover. Our technicians recommend a complete reseal of the differential unit whenever these leaks are repaired.
The engine may develop a stalling and/or no start condition due to a failed crankshaft position sensor.
2003 Mercedes-Benz S430 4MATIC QuestionsIf the batteries in my key are dead , will the car start? (1 answer)
My car doesn't start
While driving my car the engine stopped; Instrument panel lit up; Headlight shut off. I was able to coast to the shoulder while still in drive. Once in park, I waited 15 minutes before trying to start the car. the starter clicked, that's all. The battery was fine, I used my hazards for abou...
before car died battery light was on car died then started after 10 min then died again now cranks no spark have fuel and injection pulse