This is great work. Thank you so much for providing this service. I was fortunate enough to get the CDs with my car. I actually have two sets. The first set is in a blue case. The two CDs have blue labels, are marked "East" and "West," and have part number 05064142AA. The second set come in a black case, have black labels, are also marked "East" and "West," and have part number A 193 827 02 59.

My nav system doesn't recognize the blue CDs at all. The black CDs work fine. I downloaded and burned your iso's and they seem to (not) work like the blue CDs.

Does anyone know what the difference is between these two sets?