factory alarm active - cannot kill

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=7618
Printed Date: June 29, 2025 at 5:40 PM

Topic: factory alarm active - cannot kill

Posted By: mobinakhtar
Subject: factory alarm active - cannot kill
Date Posted: January 03, 2003 at 8:43 PM

Hi,

I own a 1989 mercedes 190E 2.6. The only key that I have opens pass side door and not any other. One night I locked the car from pass side and next morning, factory alarm started to come on (Honking horn). Car would not start. I tried to unlock from pass side and alarm does not turn off. At the same time I noticed that central locking is not working either.

The battery also seems a bit drained. Can I disable the clarm in any way? Do you guys think a weak bbattery is the culprit? How does the vaccum pump work (the one I think is the one incharge here for arming the alarm). Any help be great.

thanks,

Moby

Replies:

Posted By: BulletTooth
Date Posted: January 03, 2003 at 9:09 PM

To stop the Alarm you need to unlock te drivers side door with the key. I know you said you don't have it but that's the only way I know of doing it. I have done an 87 190E and the alarm was on the passenger side firewall, just take off the floor carpet, all of it, and then remove the plastic cover on the floor that goes up to the firewall and you'll see the brain. I guess you'll have to disconnect your battery to work on the car so the alarm doesn't kepp going off. Not sure about the Ignition Kill I don't think the factory alarm has it at least the one I did didn't have it, could be your battery is low.

Posted By: securinu
Date Posted: January 03, 2003 at 9:53 PM

i know the older benz keys had a red dot for the alarm key maybe you can go to mercedes and get one.

Posted By: mobinakhtar
Date Posted: January 03, 2003 at 9:57 PM

I did open the pass side firewall and there are bunch of boxes. As I remember, one said Becker audio, other had a warning sticker about airbags or SRS. did not see any other "brain" looking thing. This key that I have goes halfway into the driverside door and then seems to have an obstacke. goes completely into trunk but does not rotate. Also does not have the red dot either.

Posted By: mobinakhtar
Date Posted: January 03, 2003 at 10:01 PM

please read my earlier post about what the key is doing and advice if you guys think that the lock is bad, or should I get the red-dot key any ways? also - if according to bullettooth's response, the car is not equipped with starter kill - What happens when alarm is honking and someone tries to start the car?.

Can the dying battery be responsible of not operating the vaccum pump? and that is leading to drivers side lock not being able to be opened?