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  #1  
Old 08-05-2015, 12:43 PM
ps2cho's Avatar
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Join Date: Jun 2006
Location: Chandler, Arizona
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Diagnosing w124 alarm goes off on drivers door?

So I'm having a problem with my 88 300te where if you unlock from the drivers door it does not disarm the alarm so when you open the door the alarm goes off.

I purchased a used door alarm switch from someone on the forums that said he had no alarm issues on his car.

Installed it and still goes off.

If I unlock from trunk or passenger door it's fine.

Where should I look next? Or what can I test?
Anyway I can tell if it's still the switch or the control module?

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Last edited by ps2cho; 08-05-2015 at 01:28 PM.
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  #2  
Old 08-05-2015, 06:16 PM
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Join Date: May 2000
Location: Soperton, Ga. USA
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If I am going to repair I would start by inspecting the wiring in the door where it "pivots" for a broken/bad connection.

Personally, I just disconnected the module when it started acting up.
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  #3  
Old 08-06-2015, 11:47 AM
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Join Date: Dec 2003
Location: Palm Springs, CA
Posts: 782
I agree with engatwork on "disconnecting". Quite frankly, who would want to steal an old Mercedes? I had a '91 190 that had a funky alarm. One night in Sonoma at a motel at 3 in the morning..... Yeah it was me! Don't remember what I did to silence it but the next morning I found a local MB guy and had him shut the system down permanently.
However, my current ride is a gorgeous, black '97, S-600 coupe (CL600). I was told that this particular car is prized by the "capos" in the Mexican cartels so I am a little more careful where I park it.
Anziani
'97 CL600 51K

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