In the development of mechatronic systems, risks are caused by changing requirements. In this paper, an approach towardsthe assessment of such kind of risks is presented. Starting with the requirements list, interactions between requirementsare structured in the Requirements Structure Matrix (RSM) semi-automatically. In parallel, requirements are categorizedaccording to their source (“influence area”) and prioritized. This priorization is based on the risk of change. It is characterisedby the criteria “dynamics”, “uncertainty of knowledge base” and “relevance for product development”. The approachis validated by two approaches: structured interviews with project managers and developers as well as a case studyfocusing on a pedelec. By application of the approach, cross-disciplinary relations of requirements can be considered inorder to reduce iterations in the development of mechatronic systems such as the pedelec.