How Do we ulock our Renault Laguna car radio?

My Wife and i went on holiday too our son in Wales. we parked the car right back out of the way for other neigbours and my son and his wifes cars.
Unfortunatly i trapped some privet in the car boot that ment the light was on for twelve days and the battery was flat, the AA soon sorted the car. getting it started but I did not notice the radio code problem untill some time Later. the car is Like me old but cared for. we would appreciate any offers of use full help. Thankyou in advance
Gary

The man and his Dogs
March 2009