Renault Megane CD changer CD CODE required

Hi I have a 2005 Renault megane with an Update list radio I am trying to install a renault factory fit 6 CD changer into the dash of the vehicle and after entering the code 3112 which was supplied with the radio it comes up with Error, then CD CODE and then goes to CD 0000.
Could anyone provide me with the code? and is the CD CODE different to the ordinary code, as the manual says if it displays CD code to contact a renault dealer?

Details from the changer are:

AL R02S 71587

020385 (in bold)
8200 084 437

8 200 084 437 T A463 (under a long barcode)

S/No. stamped on the changer:
ALR02S31071587
T31071587

Thanks

Steve