Furthermore, edition 2.1 amends and clarifies particular sections (e.g. about partly completed machinery or “assemblies”).
The updated edition 2.1 is complemented by a new last section, “Specific guidance documents”, containing key guidance decisions of the Machinery Working Group (e.g. about emergency stop devices). §254 (Instructions), §255 (The form of the instructions) and §256 (The language of the instructions) do not contain any changes or only a few minor changes. §246, regarding the official languages of the EU, has minor changes.
A general overview of the Machinery Directive and its guidance documents and notified bodies is given by the European Commission at here.
A current list of harmonized standards is available at https://ec.europa.eu/growth/single-market/european-standards/harmonised-standards/machinery_en.