Correct answer
Switch off the engine under those conditions.
Switch off the engine to avoid unnecessary idling consumption, following IDAE’s general recommendation. Follow manufacturer instructions and the automatic stop-start system where fitted. Safety and necessary vehicle functions take priority. This advice does not remove lighting and signalling obligations: do not switch off necessary lights or rule out hazard lights when required.
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Always keep the engine idling to save fuel.
Always switch off all lights, even when required.
Switch off the engine under those conditions.
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