The German version of Windows Vista RTM is now available at MSDN subscriber downloads
This single download includes the following Windows Vista editions:MSDN Website
Windows Vista Business
Windows Vista Business N
Windows Vista Home Basic
Windows Vista Home Basic N
Windows Vista Home Premium
Windows Vista Starter
Windows Vista Ultimate
The product key used to install Windows Vista will determine which edition will be installed. The product keys used to install Windows Vista Business N, Windows Vista Home Basic N, and Windows Vista Starter are not currently available.