Control board for my vintage "electronic" unit runs about three bills, so am not surprised.
Now you know why so many otherwise good Miele washing machines,dishwashers, dryers and other appliances are chucked to the curb as rubbish. Control boards and other parts can easily cost 1/3 or more of what one paid for the machine. Add to this Miele's lavish call out charges as well.
If one is handy, changing a control board is not that difficult, indeed in the UK and EU there is a large DIY crowd who repair Miele and other laundry appliances themselves. Miele parts are easily available off the shelf so to speak and local appliance parts dealers.
Finally there are a few enterprising lads in the EU who will "repair" one's old Miele control board for a decent price. Have not used the service but from what one understands you send in your fried board, and they send back either the same repaired or one they have finished already. Cost is much cheaper than new and so far customers seem quite happy.
Google "Miele Control Boards" and it should come up.
Come to think of it, isn't this washer rather new? New control board and labour should come under warranty, I should think.
L.