Hi,
I got same probplem when I was trying to do it by Manual. Was waiting about 1 hour. Nothing. In manual is MISSING 1 step. When you'll push transfer button and will get screen with confirmation >> transfer in process - then just please pay attantion on next message below >> do not remember exactly but something like PLEASE submit your adress book information. When you'll get this screen >> take your phone , open bluetooth options and you'll find something like >> SEND CONTACTS
Do it. I transfer my book with around 100 phones in 15 seconds. After I sent it from phone in 15 seconds I got confirmation - transfer complete. I was test it and it working perf. Just 1 thing . In the cars book you can't store more then 2 phone for same person so if you have more - then extra record will be created. For ex. if you have 3 phones it'll be record 1 with tel1 and tel2 and record 2 with tel 3.
Hope it'll be helpfull