Manufacturing flexibility is currently one of the key trends within the automotive industry. In this context, the determination of the optimal degree of flexibility represents a complex decision problem. First of all this article clarifies chances and modes of operation of flexibility in the automotive production. Manufacturing flexibility can be used both to counter short- and medium-term market fluctuations and as a strategic approach to realize long-term costs advantages. Subsequently different aspects which have to be considered within the strategic planning are commented on in detail. The contribution clarifies that the planning of optimal flexibility requires an integrated planning approach.