I'm sure this has been asked a million times, but I just bought a 2011 A4 allroad with the mmi 3g basic system installed. The original 2011 satnav disc is scratched to all hell and isn't working. I can't find a disc that old for sale anywhere, would I be able to just stick a more recent disc in with no issues or would I need one of the full mmi system update kits with the extra SD cards? I think the most common discs regularly for sale are 2018/19 versions.