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E320 1996/300E 1992/E320 1995
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56 Posts
Discussion Starter #1
1992 300E Central locking of doors will not lock when using key in drivers door. System will look when using key in passenger door and trunk. Any suggestions or past experiences with this problem?
 

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BenzWorld W126 & W201 Host
1988 420SE, 2002 C180 Kompressor, 200 ML320
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1,159 Posts
Try disconnecting the central locking pump for 30 seconds.

If that doesn't work, it is either a bad solanoid inside the door or a fault with the alarm if you have one fitted.
 

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Registered
E320 1996/300E 1992/E320 1995
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56 Posts
Discussion Starter #4
I'll try disconnecting as you mentioned. Ref alarm I have an aftermarket installed. Is that what you were thinking of? Thanks
 

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BenzWorld W126 & W201 Host
1988 420SE, 2002 C180 Kompressor, 200 ML320
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1,159 Posts
Pete1 - 2/24/2005 3:38 AM

I'll try disconnecting as you mentioned. Ref alarm I have an aftermarket installed. Is that what you were thinking of? Thanks
Yes. Most aftermarket alarms which activate the central locking are wired through the drivers door wires.

So if disconnecting the pump has no affect then I would check out the alarm. By the way, is the central locking still working from the alarm?
 

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Registered
E320 1996/300E 1992/E320 1995
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56 Posts
Discussion Starter #6
Tks. Central locking does not lock when I use remote which it did before. Aftermarket alarm light does indicate system activated when using remote.
 

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BenzWorld W126 & W201 Host
1988 420SE, 2002 C180 Kompressor, 200 ML320
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1,159 Posts
That sounds like the link.

The alarm wiring is normally cut into the central locking wiring under the drivers footwell carpet.

Pull up the carpet and the plastic trim covering the wires.

Hopefully you will find where the wires are joined easily and one of them will have broken off and just want re soldering.

If you find where it is bridged and there is no apparent fault, cut out the alarm wires and rejoin the original ones. That should fix it (the alarm will still work, it just won't lock and unlock the doors from the remote).
 
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