The manual is here: https://www.mieleusa.com/pmedia/ZGA/TX2070/10546880-000-01_1...
Most of the smart stuff is in "settings" starting on page 64. Stuff like configuring it to run only during a low electric rate period (nights). Notifying you when filters need changing. Keeping track of detergent reservoir levels.
My dishwasher has a start delay function, basically the same... although if it's 'smart' I guess you could align it with things like a smart grid, highly variable rates, solar panels and battery. But that's something for the 1%.
Filters is a double-edged sword, because since it's a consumable, it's in the manufacturer's interest to give false positives for the need to replace filters, like printer ink.
Detergent reservoir levels, I don't know if that's a thing, mine has a reservoir for salt, but I have to put a detergent tablet in myself for every cycle. Would be convenient if it was built in, I guess.