Hi all I have a E36 328 convertible with central locking fault First off the sigma alarm remote start playing up, need to be right up close To the car to get it to work and had new battery Now if I unlock the drivers door by key you can hear the central locking Working but passenger door stays locked I have to open it from inside Or by key And the same the other way round, if I unlock the passenger door by key The drivers door won't open or lock, but unlocks boot fine Can anyone please help