How can i get a CD out of my Blauplunkt CD player?

I put a CD into slot 3 of a CDCF-00, 96 469 053XT, 5 disc multiple choice load CD3 of a Peugeot 307 (2002). It stuck and did not play nor come back out. I had to pull it out. Later I tried a different cd in a different slot (slot 5). This has done the same thing although i havent pulled this one out yet. The display shows "No CD 3". The radio and cassette both play normally. I have removed both the radio and Cd player from the dash and checked all the wires and all are connected correctly. A previous questioner mentioned that if the battery were disconnected for five seconds and then reconnected, the CD may be spat out ?? Im reluctant to do this straight away as i dont have lost the security code no. Please help !!