My recently purchased low miles one owner 2013 Full ASH A3 has an activated Sat Nav using the original 2012 SD card (Europa 8V0919866) which is way out of date regarding new roads. I am looking for the most effective and economical way of updating without forking out the equivalent of a set of tyres at my local friendly Audi dealer. Checking the "bay" shows specialists who offer apparently comprehensive updates but not for my equivalent software version. Also there are individuals offering later second hand SD cards only but with no guarantee of working. My software is MSTD_EU_AU_P2440. Short of continuing to use my TomTom does anyone have any recommendations?

Bob