Hi Raeuber,
Glad you saw the post! I did have the manual but it was quite easy to open the player anyway. Four Torx screws on the back release the large aluminium cover, which slides backwards and then upwards. There is another top plate underneath, and you need to undo all the screws around the edge before it too lifts. The large black plastic CD mechanism has two screws at the front/top - once they are undone you can unclip the front section of the mechanism which allows access to the CD/DVD inside. If you wait until I get my new drive belt I will take a few photos when I fit it.
I ordered this drive belt:
Location: Warwickshire, UK
My B&O Icons: