I have a yellowMiele Vacuum,model=Electronic

Question

I have a yellowMiele Vacuum,model=Electronic Air Clean Plus S3121. On the main body the part that the pipe/nozzle clicks into has a piece that has snapped off. I can see this by lifting the lid and the black plastic piece that is screwed to the inside of the lid has a piece chipped of it which means that when the nozzle is clicked into place it is completely loose. There is a black piece that clicks into the inside of the hoover into this broken part which is still ok so at the moment by lining up the nozzle with this loose piece I can click it into place. How can I get this piece that I need?