Hi. I had similar problem last year. It was linked toone of the switches being on, fog or rear window or internal lights, sorry cannot remember which, but I pressed them all and it stopped.
Also the alarm will sound when ignition key is in and door open so not to leave keys in car.
Hope this helps will try to remember which switch??
Steve G Blackpool
Mine sounds when the keys are in the ignition, or theside lights are on, and also if the rear fog is switched on although the main lights may be off, so I always removekeys and switch off lights. Nothing else seems to sound the alarm.
every so often, mine, for no good reason just sounds the alarm whenever the door is open, I have checked an double checked and there has been nothing turned on at all, then, just for fun it goes back to the normal lights on or key in ignition.