Miele PG 8583 CD Operating Instructions Manual page 35

 Never fill the reservoir with water.
The reservoir could overflow when filled with salt.
Add salt until the reservoir is full, making sure that the funnel still
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closes easily. Do not add any more than 2 kg of salt.
As the salt reservoir is being filled, displaced water (brine) may run
out.
Clean any excess salt from around the opening of the reservoir,
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focusing especially on the reservoir's seal. Do not use running
water as this can cause the salt reservoir to overflow.
Close the reservoir.
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 Do not force the reservoir shut if it has been overfilled.
If an overfilled salt reservoir is forced shut, this may damage the
reservoir.
Remove excess salt before closing the reservoir.
Rinse
Run the program after refilling salt.
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This will ensure that any traces of salt and brine are dissolved,
diluted, and rinsed away.
Excess salt and brine which has overflowed can cause corrosion
damage if they are not rinsed away.
Water softener
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