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.
Airmatic Pump Motor May Fail Due to Sticking Relay on Mercedes-Benz S430
Average mileage: 111,070 (13,600–200,000)
68 people reported this problem
34 people shared problem details
The AirMatic Relay and 40amp fuse are within the fuse box under the hood on the passenger side. The AirMatic pump is inside the right front fender. Remove the rubber shield on the passenger side just behind the bumper. The AirMatic pump (about $350) can be seen. Very easy fix. R/R mounting bolts and buy a new 1/2 inch air inlet hose from AutoZone ($3.00). You can replace the pump in less than an hour.
my car is sitting on my tires i was driving then the whole car just sat low on the tires i guess the airmatic pump gone or the relay how much will this cost me aprox.
2002 Mercedes-Benz S430136,000Visitor
On my car the pump continuously running, then a started the car again I heard a clunk and the pump stopped. I drove it several miles to my next destination when I started the car again it did not raise up the instrument panel stated to stop driving car is to low get service.
2003 Mercedes-Benz S430131,000Visitor
Normal driving at 40MPH, came to a stop and felt a drop in the car, but no noise so continued to drive and the dash light came on with the message AIrmatic service get service.
2001 Mercedes-Benz S430124,600Visitor
Vibrating noise on front end that makes the drive very uncomfortable. It makes you hate such a lovely car.
occasional rumbling sound under the car just forward of the passenger side firewall right after startup and car completes rising at front end. Also hear a bumping sound like worn shock when going over speed bumps even at very slow speeds.
2001 Mercedes-Benz S43040,325Visitor
The car sits very low went to dealer cost fortune
The pump continued to run after car was shut off, causing the battery to run down. Using Alldata as a reference, I unplugged the air pump to keep from running the battery down. Relay N10/1KR controls the air pump. I have yet to find the location to that relay. Alldata does not give that information.
During two years of ownership, the airmatic suspension on my s430 have frequently released air when first starting or cornering, it sounds similar to the sound of air releasing from the air brakes on a bus. The noise was easy to tolerate, so we always sloughed it off, and considered our car as kind of a 'gassy girl." Last night, after starting the car up, the noise became more pronounced, more gastrointestinal and guttural. After driving approximately 50 miles, there are no more sounds but the left side of the car is unusually low, so we are opting to have it repaired by our trusty Euro service team.
2003 Mercedes-Benz S430Visitor
The car lowered and will not rise up
2001 Mercedes-Benz S430130,000Visitor
Air pump and relay failed.
2006 Mercedes-Benz S43079,000Visitor
I'm having the same problem.
2005 Mercedes-Benz S430120,000Visitor
replaced automatic pump and now while driving the pumps comes on too often. Is there any fix for this
2002 Mercedes-Benz S430Visitor
I don't have power on air suspension compressor
2004 Mercedes-Benz S430134,000Visitor
My Air matic light just came on
2003 Mercedes-Benz S430115,000Visitor
air matic sign comes in
2000 Mercedes-Benz S430150,000Visitor
Car will not pump up
2000 Mercedes-Benz S43083,000Visitor
2009 gl450 as well. Just bought new rear air springs and compressor. Keeps blowing fuses. guess I'll replace the relay as well.??
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