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Old 05-23-2006, 10:16 AM
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Join Date: Apr 2006
Posts: 644
'88 300TE Alarm issue

My sons '88 300TE has let us down twice with a dead battery. The car was parked for 2 days both times... but has been left longer before with no problems.
As soon as I apply the charger, the alarm starts flashing the lights... the PO had removed the wire from the alarm horn, so I assume this is an ongoing problem.

The battery is brand new.
I pulled up the pass carpet and shield and removed the lower larger connector from the alarm box after reading about that in a search.
I could not get the upper smaller connector off, so I left it.

Is that correct, or should I remove the upper too?

1984 Mercedes 190D 2.2 209k miles
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Old 05-23-2006, 12:04 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Disconnect Both connectors....pry with screwdriver if needed.
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Old 05-23-2006, 03:46 PM
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Join Date: Apr 2006
Posts: 644
Thanks MB Doc.
I will do it the other plug tonight.
The battery was dead flat again this morning despite a charge and 10 mile drive on monday.
Does having the alarm disconnected have any other issues?
1984 Mercedes 190D 2.2 209k miles
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Old 05-25-2006, 11:05 AM
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Join Date: Apr 2006
Posts: 644
Ok, I took out the other plug, and charged the battery for about an hour, then I did a 3 mile drive.
This morning, it was good and started fine.

So, is it a faulty unit/sensor?
Are they repairable?

1984 Mercedes 190D 2.2 209k miles
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