Automotive systems require rigorous methods to address their complexity. EAST-ADL has emerged as a promising architecture description language for specifying requirements, from the vehicle level down to software implementation. However, due to the inherent versatility of EAST-ADL, defining specific and fine-grained architectural features of automotive systems becomes challenging without addressing its intricacies. These challenges often result in several important aspects being overlooked. In this paper, we propose a two-step process consisting of: (1) separately specifying specific architectural features using domain-specific languages, and (2) injecting these features into an EAST-ADL core model through model transformation. Our conclusions demonstrate that domain-specific languages provide a succinct means of targeting specific modeling aspects while maintaining equivalence to the implementation in EAST-ADL.