At the Institute of Automotive Engineering (FZD) at TU Darmstadt, we are developing model-based approaches for the holistic description of Automated Driving Systems (ADS) as part of the DFG research project MiRoVA. These approaches may include functional, statebased, ontological, and domain-specific modeling strategies. The goal is to systematically investigate various modeling strategies, apply selected ones to ADS subsystems, and evaluate their suitability for building a holistic system model.