W124 Mercedes - Installation of the central locking controller.

Question

Hello, I have a question about how to connect the central locking controller. The wiring diagram from the installation manual does not pass the test (pneumatic option connection). I heard that it is done with two relays, but I don't know the details. I would ask for help. Mercedes W124

Moderated By CameR:
Reg. 3.1.16 Do not post questions for which the answer can be easily found on the internet or on the electrod forum.

Gerri · Accepted Answer

No data for the car again - because 124 is not everything! From the note that there is no original remote (and not the original one), I conclude that this is a post-92 version. So the car has receivers for the infrared signal emitted by the key, the signal is amplified in the receiver and it reaches the InfraRed module located near the pump under the rear seat. There, the signal is decoded and controls the central locking pump. The pump is different than in previous years: there is no round plug with yellow, blue and green wires because there are no contactors in the door. So it is not possible to activate the central locking by turning the key in the front door or the tailgate. So the diagrams to which you are referring are crush .. to break up in this case.

darekwko · Answer

I have a w124 and the locking of the central locking is pneumatic. As far as I know, the driver is under vacuum. I would check if it is operational, check the pump vacum. In the trim of the car everything works very well as long as the shortcuts are properly fixed then they come out sideways. If the vacuum pump works badly, there should be problems with starting and shutting down the engine.

Added after 16 [minutes]:

Sorry, but I wrote a little nonsense, I checked it in the car and my memory is failing me a bit. (my star doesn't break down so often

) The controller is pneumatically controlled, but it does not take anything from the pump vacuum, but there is everything (the switchboard including the relay and the pump) under the back seat. If there are fuses in the switchboard and when they blow, it is not the trunk lighting, but more often the relay sits, which is hard to check, less often the pump. But I do not remember it well, it was described well in the forum w124. For me, I can't hurt my star and replace parts and don't cut shortcuts.

Matik208 · Answer

The point is that there is no original remote control and I want to add a control panel with remotes, I don't want to rework anything.

CameR · Answer

Just

Matik208 · Answer

when I connect according to the diagram, the connection of the pneumatic version is not controlled by the pump, so I asked if additional relays should be installed. Added after 11 [minutes]:

Matik208 · Answer

Yes you are right It is exactly like you are saying just asking how to connect it now

Gerri · Answer

This is years ago, but as far as my memory is correct, there is a possibility of connecting to the central locking button on the center console.

Matik208 · Answer

unfortunately there is no button on the console

Matik208 · Answer

I connected directly to the pump and I close the topic.

[Solved] W124 Mercedes - Installation of the central locking controller.

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