Should I include salary expectations in my CV?

No — the CV is the wrong document for this. Salary expectations belong either in the cover letter (if explicitly requested) or are discussed in the interview. The Entgelttransparenzgesetz and the EU Pay Transparency Directive are intended to create transparency — but on the employer side, not the applicant side. If the job advert explicitly asks for salary expectations: State a narrow range in the cover letter, not in the CV. Use the BA Entgeltatlas as a reference. Caveat: Some automated application portals have mandatory fields for salary expectations — fill them in there, but with a range not a fixed figure.