Hi janie sorry bout the late response, been looking into the issue with your alarm and it looks like it can be one of 3 things,
1. You have a dead cell in your starter battery causing the sensor to automatically come on under 12.5v
2. Your sliding door may be the issue, if it doesnt close properly or you have alot of crap in the runners, it can cause the central locking sensors to be out and not in contact with one another by about 2mm which will re-activate the internal alarm sensors.
3. You have a faulty internal alarm isolation switch, but its most unlikely especially if the fault is intermittent.
I would advise having a good look at the sliding door runners and clean them, also where the sensor contacts meet, you can make a thin shim(peice of metal) and add that to the sensor and see if the issue goes away, also test your starter battery as renault standard batteries are the worst i have come accross so far and dont really last long.
Have a look at this post from a renault forum it may be a bit clearer for you
http://forums.motorhomefacts.com/85-mot ... g-off.html.
And just so you know the engine you have is one of the better engines
Have fun in france
