I have exactly the same issue with my ford fiesta. I guess its the same system for mondeo and fiesta.
In my phone contacts app I have my contacts filtered to only show people with phone numbers (e.g. no google, no facebook, no etc) but when syncing via bluetooh to my car the phone just transfers absolutely everything, including hundreds of mail addresses I ever mailed/received mail from in gmail, making the car phonebook completely useless (you just can't browse through so many contacts while in your car, it's ridiculous).
If anyone knows any workaround to this issue please help!