To access the extended phone functions, you also need the newer 8P0 862 335 F (for EU, G for the US) BT-interface. Retails at around Euro 250, install (and recoding) took my dealer 1 hour last week.AudiA4B6US said:Bug fixes in most cases. The only bigger difference is between Euro 01xx and 03xx and US 00xx and 01xx. In latter case the phone functionality got significantly extended. But this doesn't really matter since you can simply load the newer software and get the same features.