The A version doesn't work with the RNS-E but some 2005 Allroad and S4 came with the E (or D for Sirius) and there didn't need a SAT upgrade. All new 2005.5 A4 should also have the second generation SAT receiver even if they have only the Concert/Symphony head unit. If you plan to upgrade a 2005 or newer Audi, always check the SAT part number first before ordering a ew receiver.