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. The affected door latch should be replaced to correct this concern.Google+
Car Problem Reports
Mercedes-Benz ML430 Electrical Switches in Door Latches May Fail
Mercedes-Benz ML430 Problem
Average Mileage: 134,986 mi (10,000 mi - 200,000 mi)
I have a problem eith the door locks. when you press the button on the key, the doors do not unlock. how do you fix this problem
Visitor, 1999 Mercedes-Benz ML430
I have the same problem. when i unlock the door with the remote and after i open the door the door locks rapidily move up and down .about three times then stops. repeats again when i use the remote door lock again. I had to replace the passenger door lock for the same problem which was very expensive. Now the diver door is messing up. I cant afford all these problems.
Visitor, 2000 Mercedes-Benz ML430, 130,000 mi
The rear passenger side door will not unlock. I haven't had it fixed yet.
Visitor, 2001 Mercedes-Benz ML430, 165,500 mi
doors won't stay locked leaving unsafe for my children. does rapid up and down and then stops. Repeats this every time I slow below certain speed.
Rear drivers door lock makes a sound as if the lock is going up and down 3 or 4 times and does not activate the lock to move up or down. Since this problem occurred the car no longer automatically locks when put in drive.
the rear passenger door lock cycles up and down 3 or 4 times when trying to lock the doors.
driver side power lock will not engage, just keeps recycling
what is the cost to repair
Visitor, 2000 Mercedes-Benz ML430, 119,000 mi
drivers side door will not lock, just keeps cycling, what is the repair cost