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Old 03-15-2005, 08:24 AM
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Join Date: Jul 2004
Posts: 16
Please Help The Alarm Goes Off For No Reason!!!

Hi, i have an ML320 2000, since two days ago the alarm goes off by itself and also the ceilling lights stay on, even after the car is turned on and i have to turn them off manually.
please tell me what i should do? should i disconnect and reconnect the battery or what? thanks
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Old 03-15-2005, 10:02 PM
Q Q is offline
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Join Date: Aug 2000
Posts: 839
Only thing I can think of is door jam switch failing on you.
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Old 03-24-2005, 01:44 AM
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Join Date: Aug 2001
Location: Iowa City, Iowa
Posts: 124
Door jam switch is out

It has to be either a short in one of the door jam switches or a short somewhere in one of the wires. I would start with visually inspecting all four of the switches, I dont think it would be the back lift gate because you said that the courtesy lights stay on, not the cargo lamp. Maybe you accidentally closed the door with something in the way and broke or pinched a wire. This happened on my friends BMW 750...he didnt know it was the door switch because he always left his courtesy lights off. We noticed the nipple of the door jam switch had broken off and was not being pushed in....this tricked the alarm into thinking the door was being opened, and the alarm would go off.
1994 S320
131K miles

1998 ML 320
126K miles

1994 Blue C220
122K miles

Im going to Grad School @ the University of Iowa
Go Hawkeyes!!!
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Old 03-24-2005, 11:20 PM
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Join Date: Dec 2003
Location: Rogersville, Missouri
Posts: 155
the history of alarm activation is stored in the aam. The history can be reviewed via star diagnosis system. Then diagnosis can begin.
1987 190E-16v,
1988 260E Gone after 19 years of service,
2006 C280 4MATIC Gone to another
2006 OM647 Dodge (Mercedes) Sprinter
Time to find another car
29 years Mercede-Benz Technician, Retired Master Technician/Master Wrench
Master Guild Technician once/ SLR Technician Nine cars serviced
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