Alarm Siren Location??? Mercedes ML270 CDI W163 53 Plate 2004 totally standard factory alarm sytem fitted i have looked in both off the front wheel arches and under wiper assembly - but i still can't the siren. i suspect the back up battery is failing, so i need to replace the siren unit.

SOURCE: Re: R reg Galant 2.0

hi it has its own back up battery inside if you not useing it take it out yates210456

SOURCE: 1988 nissan maxima factory alarm faulty

try locking and unlocking the doors with the keys that is what i did and it solved my porblem

SOURCE: My 2007 Hyundai Elantra Limited

There is a Technical Service Bulletin (TSB) that addresses intermittent alarm self-activation. It involves replacing a small rubber bumper under the hood.

See your local Hyundai dealer and ask them about Bulletin Number 09-BE-026.

SOURCE: LOOKING FOR LOCATION OF ALARM

On a 2004 CLK430 the alarm siren is located on the drivers side by the fog light and you have to take out the fog light cover in order to see it. I'm not sure if it's in the same location on the 320 or not, but it's worth checking out.

SOURCE: 1996 camry with factory alarm but siren not working

try connect the siren positive ( normally red ) wire to ur car battery + terminal ( but make sure u cut or disconnected the other end that go into ur alarm unit ). Also check the ground wire ( normally white or white/black ) that attached to car body from ur siren..