Miele PG 8504 Operating Instructions Manual page 82

Further settings
Concentration
82
Dispensing concentration for liquid chemical agents, e.g. in the case
of a change of manufacturer, can be adjusted for all programmes at
once.
Dispensing concentration must be set in accordance with the
manufacturer's instructions or with the required processing result.
Consumption of liquid agents is recorded in the log book (see
"Further settings/Log book").
...
Dispensing system

 DOS_
Concentration

Dispensing concentration can be adjusted in increments of 0.01. The
possible range is shown in the bottom line of the display.
Set the concentration using the arrow buttons  (higher) and 

(lower).
Press OK to save the setting.

Concentration
0.30 %
(0.05 - 2.00 %)