E-Class (W211) 2003-2009

2004 E500 alarm issue

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Old Mar 7, 2016 | 10:03 AM
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2004 E500
2004 E500 alarm issue

I have a 2004 E500 and the alarm will randomly go off. I can open the car with the key fob and the alarm will go off. Can start the car and will be sounding while the car is running. recently replaced the battery, went out the next morning, dome lights were on and battery was dead. Everything seems to be related to the alarm. I have read suggestions about replacing either the module or the siren itself. Any help would be greatly appreciated.

thanks
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Old Mar 7, 2016 | 04:42 PM
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2004 E500
Thank you Plutoe. Is there an easy check for the switches and SAM? I've put the car in drive and opened different doors, hood and deck lid, but have never gotten any kind of warning. I did have the car converted to the Arnott strut and coil suspension to avoid any further air suspension issue. The system came with the electronic bypass and I had it installed by a MB professional mechanic. Could this problem be in any way associated with that switch?
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Old Mar 10, 2016 | 01:06 PM
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moved to W211 forum...
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Old Mar 29, 2016 | 04:19 AM
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Originally Posted by MBR0222
I have a 2004 E500 and the alarm will randomly go off. I can open the car with the key fob and the alarm will go off. Can start the car and will be sounding while the car is running. recently replaced the battery, went out the next morning, dome lights were on and battery was dead. Everything seems to be related to the alarm. I have read suggestions about replacing either the module or the siren itself. Any help would be greatly appreciated.

thanks
Had a similar problem. Turns out the alarm itself has a battery. That goes bad. I think. W211 2006. The alarm would go on and off. Even when driving
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Old Mar 29, 2016 | 01:43 PM
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2009 E550 2000 Honda civic mash n' go
plutoe is correct, Check fuse for alarm siren, if okay you probably have another issue. Quick test is your best bet. Everything else is speculation. IF it isn't your siren itself, I'd be looking in to your rear sam circuit because that doo whickey controls/manages alot of different things.
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