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  1. 2006 530d sat nav Business or Professional?

    5 Series
    i am looking for a sat nav dvd for my 2006 530d. i am not sured i have a business or professional model sat nav. there is a seperate cd and dvd drive. i think this means its a professional?? Is there any where i can get a cheap disc? i think i can download it of gpsunderground. Suggestions...