If you look at the interior light and it has a black/reddish dome on it then it should have a Vaelo infa-red fob. Which does the alarm and central locking. The bad news is they are just like the 600/800 ones a matched pair. So you would have to by a new light unit with a fob included. They are £200 from X-Part at the min as I had to order one for mine. But if your lucky and take the light unit down you might see a 16 digit code number on a white label. If you have that then an X-Part service outlet can order you just the fob and code it into the car after the fob has been to Vaelo to be setup.