Daniel Siegl from LieberLieber Software, together with Hermann Gollwitzer from Volkswagen consider and show how MBSE is introduced at Volkswagen to develop software on the basis of reference-architecture. Fundamental interrelationships for cooperation in the multi-layered development environment for the benefit of all participants and for the development of sustainable, constantly expandable solutions are presented. Additionally argued is how Automotive SPICE requirements are perforable in a related setup as an example and how configuration management can be realized for models. Hermann Gollwitzer operates as systems architect on infotainment systems for Volkswagen AG in Wolfsburg since 2008. Before that he spent 25 years with hardware deployment and ASICs development plus 15 additional years in successful software design projects within the automotive domain.