can anyone please help this is driving me mad!! have just taken cd player out of my vectra as i intend to sell it, have replace the original unit (phillips car 400) and followed the instructions in the manual entering the code that came from the dealer (5854). started on 10 SAFE now down to 7 SAFE still no better off, can anyone please help me as dont want to sell it with the cd player in nor without a stereo!!! thanks for your time, sulks