About Fuel symbols and the 1-minute rule: which statement is WRONG?
The EU fuel symbol assigns the shapes exactly the other way round: circle = petrol, square = diesel, diamond = gas/hydrogen.
This is an environment-focused efficiency tip, not a legal duty (legal_ref: n/a).
The instruction has no exception: do not start the engine if you tanked the wrong fuel.
These fuel symbols (circle/square/diamond) only apply at Dutch filling stations.
Explanation
trap: national-scope assumption. Book p.199 - 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