ur friend has a top spec model!!
Nats....if i make it easy is just an "immbolisier". no alarm or siren etc!
my sr hasnt got an alarm...but has nats. it has central locking but not remote!!!
please dont take this offensively but are you sure u ahvent got Nats? has ur key got a blue or red square, imbedded with the key plastic at the base???
now u can add a nats system, but i reckon that would be far to much hassel than just buying a really good alarm systembut its ur choice, time and money etc!!!! as parts are expensive (unless someone knows somewhere i dont lol).
some alarms have functions to include remote central locking aswell which helps.
