  Modelling the logical architecture of an automotive system as one central
step in the development process leads to an early understanding of the
fundamental functional properties of the system under design. This supports
developers in making design decisions. However, due to the large size and
complexity of the system and hence the logical architecture, a good notation,
method and tooling is necessary. In this paper, we show how logical
architectures can be modelled succinctly as function nets using a SysML-based
notation. The usefulness for developers is increased by comprehensible views on
the complete model that describe automotive features, variants, and modes.
