Miele SOFTTRONIC W 1113 Operating Instructions Manual page 16

Hardness Water Water German
level quality hardness hardness
in mmol/l °d
I soft 0 - 1.3 0 - 7
II moderate 1.3 - 2.5 7 - 14
III hard to over 2.5 over 14
very hard
If the water hardness level is between II
and III, you can soften the water to
reduce detergent consumption.
The detergent packaging should
indicate the correct amount to use in
your machine. Add the detergent, then
add the water softener. You can then
use the recommended amount of
detergent for water hardness level I.
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