Airmatic Pump Relay May Stick and Cause Dead Battery on Mercedes-Benz ML500

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. After parking and exiting the vehicle, the airmatic pump should only run for a few seconds before turning off. It should not come back on until the driver's door is opened.

RepairPal Verified
Average mileage: (–)
2 model years affected: 2006, 2007
2 people reported this problem
0 people shared problem details
Related Items:
After a heavy rain storm, the drains for the heating, ventilation and AC (HVAC) system intake c...
my ml500 has been shaken the fuel pump coil packs and wires has been changed ran for a couple d...
 The tailgate latch may stick causing a drain on the battery while the vehicle is parked.

Related Content