I can't tell you because I don't have the user guide... My newish Miele dishwasher takes just 5L for the Prewash programme but most other programmes use 13L - the two heavy programmes use 17L and 13-22L depending on dirtiness.
As a rough guide the answer for my D/W is 13Litres for each wash.
If you really need a precise answer you might consider running the drain pipe into a bucket as a test - then measure the water in the bucket.
