hi,
Sorry, I cannot reply in German.
Please go to menu->memories->actions.
Add a 'Dashboard Playback Fader Grid' actionlist.
Add an action and enable 'learn', now move the desired fader.
Inside the action you add a 'Playback Fader/Button' task for each playback you wish to manipulate.
Set the task's feature to Speed and the function to Control.
cheers