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.
Resources for the Repair and Maintenance of your 2003 Mercedes-Benz S430
2003 Mercedes-Benz S430
2003 Mercedes-Benz S430 Problems
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.
The door for the vanity mirror (or the frame for the door) can break; due to a redesign, the mirror "cassette" will need replacement.
The electrical connector at the automatic transmission may leak fluid. Over time leaking fluid could migrate through the wiring harness and damage the transmission control module. If that happens a new harness and control module may be necessary to correct the problem.
2003 Mercedes-Benz S430 Recalls (Recent)
RepairPal Expert Overview:
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.
RepairPal Expert Overview:
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.
2003 Mercedes-Benz S430 Questions and Answers
I had my brakes changed, but the Brake Wear indicator still shows up on my dash. How am I suppose to get rid of the indicator?
I am consiodering purchasing this car and am curious about the overall rating
Sometimes won't shift out of park.
sound system comes on, have no sound or any noise from radio cd or anything
2003 Mercedes-Benz S430 Reviews
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.
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