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E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

How to disable the factory alarm?

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Old 03-22-2011, 09:00 PM   #1
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How to disable the factory alarm?

My alarm has been acting up lately on my 94 e420, just wondering if anyone has ever disabled or had similar problems with there alarms. any help appreciated.
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Old 03-22-2011, 11:45 PM   #2
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Very common issue.
It resides under the passenger carpet.
Its made by Becker. Unplug the red connection/plug.
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Old 03-23-2011, 08:47 AM   #3
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oh alright thanks, i unplugged every connector other than the red one because i thought it had something to do with the air bags.
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Old 03-23-2011, 01:10 PM   #4
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Leave the RED plug alone

Quote:
Originally Posted by semis1 View Post
Unplug the red connection/plug.
DO NOT unplug the RED Plug. It IS for the airbag/SRS!

That's why MB put a warning label about it on the plastic cover. That's why it RED!

Only unplug the two black plugs from the Becker module.
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Old 03-23-2011, 01:19 PM   #5
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Hmmm, it must be a facelift thing then.
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Old 03-27-2011, 09:48 PM   #6
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Ya I read the warning label, the red one is staying connected.. I tried unplugging the black one to the left with two connectors on it and it wouldnt start for me.
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Old 03-30-2011, 12:16 PM   #7
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bump. I have to be able to lock my car up
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Old 03-31-2011, 10:09 AM   #8
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Disable or disconnect E320 E420 E300 alarm

For future reference, the red plug has never been related to the alarm, “facelift” or not. Every airbag-equipped 124 vehicle has an Attention label on the black metal cover plate identifying the red plug as part of the airbag and seat restraint system. If it’s unplugged, the red SRS lamp in the dash lights up warning about a problem with the airbag/SRS.

As many know, the original alarm system could be disabled by disconnecting the two black plugs from the Becker alarm control module under the metal plate in the passenger-side foot well.

In 1993, MB added an ignition kill feature to the alarm system, controlled by a relay behind the instrument cluster. So if you disconnect the two black plugs from the Becker alarm module, the car won’t start.

Here’s a link to someone who figured out a work around to disable the 1993+ alarm system while still allowing the car to start:

http://www.peachparts.com/shopforum/...d.php?t=269799

If you do this, post back how it worked for you
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Old 03-31-2011, 01:30 PM   #9
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ds190, you are correct. I misspoke. (It's been a while since I did mine)
I meant to say the black little box, in the following picture it is located to the upper left of the alarm box.



That will disconnect the alarm, but as you mentioned, the 2 plugs will as well.
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Old 03-31-2011, 10:28 PM   #10
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how funny i was going to ask the same question today

heres the deal i took my car to mb to turn on my radio i needed a code so they did it and now my alarm goes off spontaneously but there is no alarm i just see the lights blink on and off

1. how do i get my alarm to work with sound?
2. how do i change the sensitivity?

edit:
also the car is 94' E420

Last edited by Dj Death42er; 03-31-2011 at 10:30 PM.
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Old 05-01-2011, 02:29 PM   #11
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Quote:
Originally Posted by ds190 View Post
For future reference, the red plug has never been related to the alarm, “facelift” or not. Every airbag-equipped 124 vehicle has an Attention label on the black metal cover plate identifying the red plug as part of the airbag and seat restraint system. If it’s unplugged, the red SRS lamp in the dash lights up warning about a problem with the airbag/SRS.

As many know, the original alarm system could be disabled by disconnecting the two black plugs from the Becker alarm control module under the metal plate in the passenger-side foot well.

In 1993, MB added an ignition kill feature to the alarm system, controlled by a relay behind the instrument cluster. So if you disconnect the two black plugs from the Becker alarm module, the car won’t start.

Here’s a link to someone who figured out a work around to disable the 1993+ alarm system while still allowing the car to start:

http://www.peachparts.com/shopforum/...d.php?t=269799

If you do this, post back how it worked for you
Thanks for this. I did this last weekend. Havent had any problems so far.
Also MB has a hook tool that makes removing the cluster a sinch. Ill grab the part number and post it up.
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Old 05-01-2011, 03:30 PM   #12
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U can also pick up 2 paint can openers from
home depot for free to pull the instant cluster for
free that will work just ad good as they have the same hook.
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Old 05-02-2011, 12:09 AM   #13
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So theres a cable that was unplugged behind my radio I plugged it back I'm and it fixed my problem
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1984, 1993, 300e, 320, 93, alarm, benz, car, deactivate, disable, disarm, e320, factory, mercedes, start


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