This might help:
8H0 035 192 Audi A4 Cabrio Europe Basic, MY 2004, 8H (B6/B7)
8H0 035 192 A Audi A4 Cabrio Europe, MY 2006, 8H B6
8H0 035 192 B Audi A4 Cabrio North America, MY 2005.5, 8H B6
8H0 035 192 D Audi A4 Cabrio, region/MY/SDS unknown
8H0 035 192 E Audi A4 Cabrio, region/MY/SDS unknown
8H0 035 192 F Audi A4 Cabrio, region/MY/SDS unknown