No diagram, and nothing more than the statement above. I made a formal complaint to Volvo and they referred me to a document, dated November 2023, for the 2024 model and said it was the applicable document, not the one embedded in the online manual for my 2026 model and dated April 2025. They have refused my complaint and I have now complained to the Motor Ombudsman (though not holding my breathe), so am gathering evidence for that and for a potential legal action. I really don't like being taken for a fool.