SummaryThe overall complexity of future cars requires new design methods for effective and high quality results. A new VLSA-approach (VLSA = Virtual Leveled Systems Architecture) for modelling networked systems is proposed. As a support for the application design engineers a set of so-called Virtual Memory network drivers is described encapsulating the implementation details of the actual network protocol resulting in more economic and higher quality solutions. In the first step a software network driver set for VMO-level (VMO = Virtual Memory driver level O) is proposed for CAN networks based on 96- and 51-family controllers. As a complement to the design phase support a set of network development tools is mentioned helping the engineers in the test phases of networked systems.