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Due to increasing complexity of communication infrastructures in the automotive domain, reliable models are necessary in order to assist designers in the development process of networked embedded systems. In this context, transaction level modeling, supported by languages as SystemC, is a promising solution to assess performances of networked architectures with a good compromise between accuracy and simulation speed. This article presents the application of a specific modeling approach for performance evaluation of a networked embedded system inspired from the automotive domain. The considered approach is illustrated by the modeling of a video transmission system made of three electronic controller units and based on a specific power line communication protocol. The created model incorporates description of various communication layers and simulation of the model allows evaluation of time properties and memory cost inferred.