The integration of mechanical, electronical and informational components characterizes modern technical products. These mechatronic systems usually provide high product functionality by which the product complexity is increased. Handling this complexity confronts the manufacturer with technical but also organizational challenges. The improvement potentials of the existing development processes are analyzed as a possibility of facing the organizational aspects. For that reason a maturity model is developed that identifies the weaknesses in detail and shows the next steps for improving the interdisciplinary development process.