I'm looking at buying a facelift W204 and can see the vast majority come equipped with the Becker SatNav system, but a few do have COMAND fitted. Can someone please run through the differences between the 2 systems ie what extra features COMAND gives? Does Linguatronic only come with COMAND? My dad has a facelift W212 with COMAND and that auto-alerts when a text message is received, with option to READ or IGNORE (via verbal command) - is this also something that only COMAND does? Thanks.