In this paper, the authors is to find an Intelligent parameter which is based on mobility and Clustering. This metric will be integrated in the selection process of MPRs to improve QoS in MANET's networks. The unpredictable mobility and the large quantity of generated traffic by each node interface make communication in network increasingly difficult to manage. Thus, routing protocols need to be adapted to such conditions. In order to make OLSR (Optimized Link State protocol Routing) protocol more robust, piercing and more adaptable to the conditions dictated by the environment of each node, this paper proposes a polymorphic metric that changes depending on the network behavior.