About Fuel symbols and the 1-minute rule: which statement is WRONG?
The instruction has no exception: do not start the engine if you tanked the wrong fuel.
The symbols come from Directive 2014/94/EU and have applied EU-wide since 2018, at every pump in every member state, not only in the Netherlands.
The EU fuel symbol assigns the shapes exactly the other way round: circle = petrol, square = diesel, diamond = gas/hydrogen.
You are legally required to switch off the engine if you stand still for longer than about 1 minute.
Explanation
trap: advice-as-law. Book p.198 - this is an environment-focused efficiency tip, not a legal duty (legal_ref: n/a). The 1-minute threshold is a guideline to limit unnecessary emissions, not an offence if not followed