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  #1  
Old 03-08-2004, 09:22 AM
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Join Date: Jan 2004
Location: houston
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300e Anti Theft Alarm

1990 300E 3.0

Recently I noticed that as soon as I try to open my car from driver side door, alarm goes off. But, this problem is not from passenger side door. Further, the alarm problem is intermittent.

Please advice how to check. Thanks

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  #2  
Old 03-08-2004, 10:18 AM
J.HIDALGO's Avatar
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Join Date: Jul 1999
Location: Jax, FL
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It is most likely your key lock!

I tried different things until I eventually had to replaced the whole key door lock from the dealership. Not cheap!
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'86 300E
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  #3  
Old 03-08-2004, 05:43 PM
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Location: Southeastern PA
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My dad had a similar problem with his 1995 E320 driver's door. The dealer replaced the door lock mechanism, but the source of the problem was a loose electrical connection under the front passenger carpet. Unsnap the carpet/sound insulation insert and remove it from the car so that you can inspect the electrical connections to the hidden black box that bolts to the floor. The oxygen sensor cable runs from the driveshaft tunnel toward the passenger door ... ignore that one.
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Old 03-09-2004, 10:31 AM
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Thanks. I will check it this weekend.

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