Not working remote central locking and alarm
I have just upgraded from the 33 world to a 155 2.0 16V. Very pleased with my purchase BUT have a little problem with the remote central locking. I have two master keys and two normal keys both with remote cl buttons. Neither had a battery in when I bought the car, but all that happens with fresh batteries is the little red led on the key flashes. The cental locking doesn't operate and the alarm is not armed. I don't seem to have the 4 digit codes written down anywhere. What is the likely problem and how can I solve it? Do I need the keys to be recoded or is there a simpler explanation. Also is there a way to arm the alarm manually, and yes it is switched to on, on the switch in the glove compartment. I'm sure this is a common problem, so hopfully someone will have an easy answer to this.
Thanks in advance.