This paper presents a model-driven development methodology for automotive real-time embedded systems that is augmented according to realistic but intellectual property free automotive benchmarks. The augmentation correspond to the enrichment of various real-time properties and design decisions in the methodology, including the specification of different activation rates and patterns along embedded software component chains. These chains can be deployed within Electronic Control Units as well as on multiple distributed Electronic Control Units connected by on-board networks. This is achieved by extending the modelling language pillar of the methodology with structural elements and constraints guiding the specification of the activation rates and enforcing the activation patterns in the chains. The proposed extensions automatically discard non-complying activation rates along the chains and aid the engineer to select valid activation rates according to the automotive benchmarks. The extended methodology reduces the complexity of software development in automotive real-time embedded systems.