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Old 01-24-2006, 12:54 PM
NordikWolf's Avatar
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Join Date: Jan 2005
Posts: 31
1988 420SEL Alarm will not shut off!

The security alarm keeps going off intermittently on my 1988 420SEL especiall when I am driving it! How do I shut it off? Someone mentioned there is a module in the passenger compartment that might have gone bad.
HELP!

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Old 01-24-2006, 01:43 PM
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Join Date: Dec 2004
Location: Eugene, OR, USA
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Alarm module location

The alarm in my '86 300E started going off at odd times after I brought the car from Californis (dry) to Oregon (more humid). I had to disconnect the module.

On my car, and likely on your's too, the module is under the passenger side floor mat. If you take up the mat and the sound panel under the mat, you should see the module. It will be about where you place your right foot. I'm talking about the US model with the steering wheel on the left side of the car here. Just pull the connector off of the module to disable the alarm.

There was a TSB from Mercedes about relocating the alarm module to a point higher up on the side under the dash if moisture was a problem.

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1986 300E
1993 Volvo 940 Wagon
1984 Volvo 240 (daughter's)
1976 Dodge 1/2T pickup, gas hog
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