Yes you can here is what your DC dealer have to do with the computer tool (sorry it's in German):

Hauptmenü
|
--EDW
...|
...--Variantencodierung
.......|
.......--Ländereinstellung: Rest der Welt
.......--Alarmsignalsirene statt Alarmhorn
...........|
...........--Niederländische Einstellung
...........--Lautstärke
...............|
...............--2%
...............--4%
...............--6%