I am writing my thesis on sustainability performance of the automotive manufacturing companies and this is one of the empirical questions of my research.
I would like to draw your attention to the following German peculiarity, which may be of interest for your work: The German Accounting Standard 20 (DRS 20) contains requirements for reporting on sustainability. For example, companies are required to present their sustainability activities in the reporting accompanying the annual financial statements (German law: HGB 315 (5), p. 2) if non-financial performance indicators are used to manage and develop sustainability. This naturally also applies to the German automotive companies.