I have a 2015 or so era Miele and have taken apart the dish washer and some design decisions are a bit dubious too.. cost down of physical relay from traditional bulky electromechanical relay to solid state (without heatsink might I add) and situated on top of the dish washer where it's warm. you can tell they don't really care enough about it, as the location which worked for older style relay but would be hostile for newer relay which on paper have better reliability.