Airmatic Pump Relay May Stick and Cause Dead Battery on Mercedes-Benz S350

Problem Description and Possible Solution

On vehicles with airmatic suspension, the airmatic pump relay can stick, causing a dead battery, because the pump continues to operate when it should be shut off. Eventually, the pump will fail; the pump, fuse, and relay will need replacement.

Problem Data
RepairPal Verified
Average mileage: 59,500 (41,000–78,000)
1 model year affected: 2006
3 people reported this problem
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Airmatic pump would keep running even long after turning the engine off. Disconnected battery to turn the pump off. Had relay and fuse replaced. The very next day pump failed and had to replace it.