There were two infotainment options for the W205 pre-faclift (2014-2018), a basic Audio20 unit with optional Garmin Map Pilot on SD-Card, or the higher-end COMAND Online NTG5*2 with built-innavigation. The latter had a bigger screen.
If you car has Audio20 with the smaller screen then you can retrofit COMAND and the bigger screen. But note that the infotainment unit needs to be replaced with the screen.
Give www.commandonline.co.uk a call, they will tell what can be done and what the costs are.
There are also aftermarket (not Mercedes-Benz) Android-based systems you can fit with larger 10.25" screen, but you'll lose the original look and feel.