If so replace the fuse.
Ml500 door lock problem.
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Turn the key to position 2 all your cluster lights are on.
All doors lock bu read more.
Now press down on the unlock button in the center console to lock the doors for at least 10 seconds and this will.
You ll probably need to take it to a shop to get fixed.
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Before doing so have disconnected old door lock from actuator.
Check your fuse box first to determine if a blown fuse is keeping the lock from working.
Plugged in new door actuator and tried the fob.
Don t start the car yet.
First check the wiring for door lock if all good faulty door lock must need to be replace.
64 people reported this problem.
If just one lock won t open on your mercedes then the problem may rest with broken wiring a bad solenoid or perhaps with a blown fuse.
Sign in to reply matte on october 26 2009.
The affected door latch should be replaced to correct this concern.
Problem description 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.