Audi A6 2013 4G0 MMI Update With Online ODIS

Hi,

Does anyone know if and how I can update MMI's using ODIS with online connectivity? If I can, will it install newer version (if exist) for that year model, or will it install newer version? (For example if I update 2013 Audi A6, will it show the latest version for 2013, or the latest version for 2015-6, same MMI)?
Can I get the maps update to through ODIS online?

Thanks.