'85 300SD Alarm Problem

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T. Wood - 01 Apr 2005 19:27 GMT

I hope someone can help with a factory alarm problem on my '85 300SD. It
has started going off for no apparent reason and using the master key in the
trunk and the doors will not silence it. I assume some relay has failed.

I don't need to fix the alarm, I just want to disable it. I have pulled the
electrical connection to the trunk vacuums diaphragm. I have taken the
fuses out for both the horn and the locking system. Nothing stops the horn
and lights from blaring whenever I open a door.

Can someone tell me where to look for the alarm itself and how to disable
it?

Thanks,

Terray

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marlin - 02 Apr 2005 00:40 GMT

Open the front passenger door, take off the passenger floor mat, take off
that lower mat. Now you should see black plastic panels both on the flat
part of the footwell and the sloped part. The flat part plastic is held on
with a screw. Take it out and take out the flat part plastic. Now push up on
the sloped plastic to unhook it and pull it off. You will see to wiring
harnesses on the backside of this sloped plastic, disconnect both.
Richard

>I hope someone can help with a factory alarm problem on my '85 300SD. It
> has started going off for no apparent reason and using the master key in
[quoted text clipped - 14 lines]
>
> Terray

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