I'd like to find out what the correct part number is for the snap-in adapter for the iPhone (that can play music too) that's used with the 6NF smartphone adapter option. This is for an X5 E70.

I've read through the following document:
http://www.google.com/url?sa=t&source=web&ct=res&cd=1&ved=0CAYQFjAA&url=http%3A%2F%2Fwww.[Oops!].com%2Fforums%2Fattachment.php%3Fattachmentid%3D33 0392%26d%3D1259594446&rct=j&q=84+21+2+153+098+bmw&ei=n7OdS_-eDIL8NaS5uYkF&usg=AFQjCNGQn4OsqgbVazIuNPDLm5sTBMw0bA

These are the part numbers in the document:
84 21 2 158 682 (Snap-in adapter for mobile phones
Apple iPhone™ 3G S)
84 21 2 158 683 (USB Snap-In Adapter for the Apple iPhone™ 3G S)

First, which one is correct, and second, what is the price for the correct one?