[W126 Coupe] FACTORY ALARM COMING ON AND STAYING ON WHILE DRIVING.

[Steve Nervig]

On Oct 2, 2005, at 4:52 PM, bruce tranter wrote:

> Hi All,
> Has anyone information on the factory installed alarm unit?
> Mine is going off while driving, and will not stay off more than a  
> few seconds.
>
> 1) How do I disconnect the alarm?
> 2) How do you test the door, trunk and hood pins for the alarm?
> 3) Is there an altimeter unit used for the alarm? And if so where  
> is it located?
>
> Any ideas ??????
>
> Thanks
> Bruce

Bruce, if this is your '84 500SEC then it *could* be the tow-away  
sensor of the Alarm system. In the early alarm systems (prior to car  
chassis end number A273146), there was included an anti-tow-away  
sensor, (on the W126, you can reach and disable it behind the trunk  
lining, upper left forward corner. It is component N27). This sensor  
was problematic, often giving false alarms. You can just unplug the  
N27, and this might solve your problem, leaving the alarm system  
otherwise intact.

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It was removed in later systems, so if this is your '91 560SEC,  
nevermind. :-)

Regards,
Steve
--
If you don't know where you're going,
any road will do.