problem with my 6CD-charger Bose

I have a Delta CC Bose System in my A4 Avant. I cannot eject the CD tray anymore. I have an error message on the radio's display : CD00 ERR. Please help.
Thank you
PS : the Radio seems to be a Blaupunkt, maybe the 6CD-charger is also.

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.