This document is a technical report detailing FEV Signature Solutions' offerings in OBD HiL testing. It outlines the company's extensive experience in virtual testing and calibration, particularly with ECU systems from manufacturers like Bosch and Vitesco. The report explains the services provided, including HiL testing for various OBD standards and the adaptation of OEM HiL systems. It also describes the automation of test case creation and the integration of testing processes into OEM development. The report presents a case study involving a German premium OEM, highlighting the scope of responsibilities, including GAP analysis and automated monitoring of model requirements. It documents the successful execution of over 90 test campaigns, identifying more than 40 software and calibration issues. The report emphasizes the importance of enhancing models to meet increased requirements sustainably, showcasing specific examples of OBD II test cases and their complexities.