My Sat nav is not working since it doesn't have SD card and it navigation need to enable by the Audi dealer. SO I am planning to get a external device and keep it in dash. I can see various screen sizes available in amazon, can any one guide which one will be suitable for Q3 ? also any model...

Hi Following a recent visit to Hatfield Audi for a full service and MOT i decided to enquire about updating maps on the sat nav to then be advised its £600 for two sd cards and the labour to install the update This is rather expensive considering a full service is only £480 Does anyone know...