hi,just wondering if anyone can help,recently bought a renault megane,the battery was flat and stereo now needs a code which was not with the car,it is a radiostat 6010,serial no.7700433072k748,model no.22dc461/62l,product no.fd0998474104873,and a stamp on metal casing Rn461fw4104873,any help greatly appreciated,many thanks alan.