In order to show your personal support Mercedes and the DFB have established a virtual arena in which you can share the thrill with other fans and leave your support statement. Of course there are a lot of prizes to win if you participate. Find out more about this here. A good thing about all this is the fact that the more people join the community of supporters the more attractive the prizes will get.
If you want to join the fun, then sign in here. As a sign of support you will get the official supporter-pin from Mercedes Benz and the DFB.