If you dont have comfort access then the remote isnt like replacing a battery it is sorted, you will need to buy a new remote. In that saying the CAS module, correct me if I am wrong our Guru

raise:, can only store 10 keys which I believe 3 is used when your car leaves the factory. So just keep that in mind also, future reference, CAS module will need replacement once you get to 10 keys.
Anyway, OP glad you sort of sorted. Hope the remote keeps working, but if it is the remote then you going to have to replace the complete remote and not just the battery. And they expensive
