right when i bought my car it had a sigma alarm fitted to it. m seris one i think. never used to have any problems with it. then for no apparent reason i now cant disconnect my battery withough the alarm goign off, apparently i have to stick a key in the back of the siren and that will sort t out. this was told to me by the place that fitted it who where so helpful and polite (not). im not sure if i have these keys i found some the other day but dunno if there right as i have no idea where i need to stick them. i had a look aroufd the siren but doesnt seem to be anywhere for them, anyone no. the other thing is my standard renault alarm and immobiliser are still fitted i asked about having it removed cos its a bit of a pain and was told it cant as i effects all the ecu and stuff is this true.