Hi if you purchased your vechile from a dealer, then they have the code, which by rights should be in your service pack, if not then you have to re-visit the dealer and they will charge you to apply for a new one,( Bandits im afraid ) which there is a cost, if you put the system in yourself then sadly you will find it very hard to find the code, i used to be a parts advisor.!
Had no end of these questions, and charges are 10-15 quid.!!
Chell'e, February 2009