1999 Mercedes-Benz ML430 Q&A
1999 Mercedes-Benz ML430 Question: door locks
The best way to really zero in on this problem is to scan the module that controls the door locks. It could be a switch, a module, a faulty door lock motor etc. A good Mercedes Tech should be able to zero in on this issue in less than an hour of shop time. You can go to a good independent Mercedes shop. before replacing the module, have the system scanned. $1400 is an expensive 'dart' to throw if you are wrong. Can you lock the door lock from the inside? This is 1 way to eliminate the key factor. If you can't lock the doors from the inside with them all closed, it is doubtful it is the key. On Mercedes, the Master is the Trunk/rear hatch lock. Try your key in that, see if it either opens or locks the locks. This is 1 key test. Also hitting the remote lock or unlock buttons on the key is another. - dandd
it can be the key, but as I just found out it was the module in the fuse box in the engine compartment water got into the fuse box $1400 plus tax installed - ML from Vancouver
Help me with my NOISY ML door locks!!!!!!!!!! I got quoted months ago for this to be fixed, but I decided to wait on that repair...
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....
Back passenger automatic door lock is stuck when I hit lock on key ring alarm it makes rapid taping sound
The door lock makes a rapid loud taping sound & won't lock but alarm is armed. I've been told it sounds like an automatic gun. Pretty embarrassing.
The power window switch may fail and the windows will not raise. The main switch at the front center console is commonly at fault. A failed switch will require replacement.