Hi guys, just wondering if this Sat Nav is worth buying for my A3 as I have the concert radio system and want to upgrade. Do either of these items have all the required parts for installation or do I have to get a hold of additional parts? Finally, I would also want to know if there is anything that will not allow these systems to work in Australia. Ebay Sat Nav 1 Ebay Sat Nav 2 Thanks in advance everyone. Kash.