Opinion of Advocate General Spielmann delivered on 11 September 2025.#Dürr Dental SE v Cattani Deutschland Helmes GmbH & Co. KG.#Request for a preliminary ruling from the Bundesgerichtshof.#Reference for a preliminary ruling – Medical devices – Regulation (EU) 2017/745 – CE marking of a medical device falling under risk class IIa – Oil-free dry air compressors for the production of compressed air for dental treatment – Making available on the market – Obligations of distributors – Verification of the classification as a ‘medical device’ where the manufacturer has affixed a CE marking to the device in question as ‘machinery’.#Case C-10/24.