It would help to know exactly what radio model you have fitted but start here:
http://secure.ford.co.uk/OwnerServices/Owners-Manual/?selectedYear=2006&selectedModel=Mondeo+%282001%29
https://www.ford.co.uk/owner/resources-and-support/sync-bluetooth
http://www.freefordradiocode.co.uk/manuals/ford/content/pdf/mondeo_mk4.pdf
This isn't strictly relevant to your problem but may be useful to remember:
https://www.justanswer.com/uk-ford/23aqa-i-ve-2006-mondeo-titanium-x-sony-cd-bluetooth-bluetoo.html
Acp, July 2017
