Electrical switches in the door latches can fail, causing the door locks to rapidly actuate up and down multiple times when the locks are activated by either the keyless remote or door lock switch. A new door latch will need to be installed.
Car Problem Reports
Mercedes-Benz ML500 Electrical switches in door latches may fail
Mercedes-Benz ML500 Problem
Average Mileage: 105,536 mi (40,000 mi - 142,680 mi)
Visitor, 2006 Mercedes-Benz ML500, 95,000 mi
2 door locks failed recently...expensive fix...like always.
Visitor, 2004 Mercedes-Benz ML500, 130,000 mi
Right rear door lock solenoid activates severl times when you try to lock the doors and the right rear door will not lock. It activates rapidly 3 - 4 times.