Mercedes-Benz
S430 4MATIC
10

Airmatic Pump Motor May Fail Due to Sticking Relay on Mercedes-Benz S430 4MATIC

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 74,500 (54,000–94,000)
4 model years affected: 2003, 2004, 2005, 2006
10 people reported this problem
Comments
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it keeps hissing, just want to know possible solution.
had mecurly mercedes put in new pump