I was pleasantly surprised with Miele Tech Support.

Our 6 year old Miele DW had a flashing Water Intake light

The good news is that the Miele people have tech's that will help you diagnose the problem - and Miele sells the parts. The tech number is: 1-800-999-1360.

In my case, they showed me how to read the fault code and reset the DW. They also reccommend what parts to be replaced if the fault reoccurs.