A long time span often lies between the production (initial configuration) and the reconfiguration of a technical system. During that time new components are invented and related knowledge changes. The goal of this examination is to use the same knowledge base over years. One common way to solve this problem is to integrate a versioning system into the knowledge base. This article however examines a more natural and "dynamic" way of knowledge growing old. This mechanism will be integrated into a reconfiguring system for electronic systems in cars, making their extensions or repair more individual, more flexible and more actual thus increasing quality.