Hello, I picked up a C3 1.4hdi lx model 2004, yesterday & joined the site. First problem, this morning - flat battery. I just got home from work & I want to remove the battery to charge it. I have read through the owners handbook & radio pamphlet & all the other paperwork but can find no information on whether the radio is coded or not? On one of my previous cars I made the mistake of removing the battery & then it was very difficult to obtain the code for the radio. I'm pretty confident it is the original unit, at least it is the same as in the picture in the booklet. It's a CD player & worked fine yesterday. Any advice please? Thanks, Tania.