Remote for central locking does not work - how do i fix it?

THE remote for your clio slides apart but is tricky the first time you attempt it, after doing it you will never forget how. once opened you will notice it has dovetail style plastic lugs that lock into each other, replace the battery and good luck. I have just replaced mine but still does not work where is the sensor located for the central locking? I was told it was behind the head lining but after inspecting i can safely say it is not! Well not on mine in any case

Marty
March 2007