Within the scope of our assurance engagement, we performed amongst others the following assurance procedures and further activities: y Obtaining an understanding of the structure of the sustainability organization and of the stakeholder engagement y Inquiries of personnel involved in the preparation of the Non-financial Report regarding the preparation process, the internal control system relating to this process and selected disclosures in the Non-financial Report y Identification of the likely risks of material misstatement of the Non-financial Report y Analytical evaluation of selected disclosures in the Nonfinancial Report  PricewaterhouseCoopers GmbH has performed a limited assurance engagement on the German version of the separate non-financial group report and issued an independent assurance report in German language, which is authoritative.