[ce4]

Have a look at the overview on Geizhals.de - Almost all current models have optional hot water intake nowadays (like 95%+ of the models from AEG/Bosch/Siemens/Neff/Bauknecht/Miele). This is to further advance the energy-rating. Doesnt apply to the cheaper manufacturers though.

981 of 1027 models from a number of well-known brands have an optional hot water intake: https://geizhals.de/?cat=hgeschirr60&xf=1069_AEG+Electrolux%...

[kuschku]

Whether you heat the water in the dishwasher or in an instant water heater, it's still going to be the same amount of electricity for the same cost.

I think in the US people might heat water with natural gas, which is cheaper, but that's not really the case in most rental apartments in Germany.