Explore Your 2003 Mercedes-Benz S430

A guide to problems, costs, maintenance and repair for the 2003 Mercedes-Benz S430

2003 Mercedes-Benz S430 Problems

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.

CD changers, command units, voice control units, PSE units, and Tele Aid units are prone to failure, especially in early models.

The crankshaft position sensor may fail. Symptoms of this are: The engine will crank—but not start—especially when the engine is warm. The car may start again if it is left to cool off, but it may run roughly or have poor performance.

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2003 Mercedes-Benz S430 Questions

The car performs great otherwise. The noise seemed to start when I put some regular gas in it one time even though I have used ultra premium ever since. Am I in big trouble?

It happened before more and more often, it wouldnt let the gears switch, so i would restart the car and it was normal after that, only the first one worked and now for a couple days its always like that, the mechanic checked and said it was a po715 code meaning it was a speed sensor or the abs one

i just had back and front rotors and brakes replaced.

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2003 Mercedes-Benz S430 Recalls

The hose may corrode due to extensive exposure to humidity. This may cause fluid leakage onto the catalytic converter. This would present a fire hazard. Dealers will a new high pressure distrution hose.

The trunk lid springs could fail in the closed position. If the trunk lid is manually lifted, it may not remain in the open position and could cause injury if it comes down unexpectedly. Dealers will replace both trunk lid springs to correct this concern. The Mercedes-Benz recall number is 2004 050015.

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2003 Mercedes-Benz S430 Reviews

I have major suspension problems and the trunk looks open all the time.I have had to repair the suspention/ air shocks 3 times at $4,500 a whoop! There should have been a recall on the suspension system it is dangerous and costly. I have broken down 3 times with my car sitting on the street like a lower rider, SHAME ON MERCEDES BENZ

This is the first MB I've ever owned and its the best car I've owned. I have had several luxury vehicles and am a chauffeur by trade. I have over 250000 miles on it and you would never be able to tell it. Im going to try to get at least 400000 miles same engine/trans.

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