Cars are an entire mystery to me. My little old Fiesta suddenly showed a strange lit up thing on the dashboard. Quite a pretty feathery circle type of a thing. I was worried it meant a disaster was imminent (oil leak or some such) so I took it to our village garage in a panic.
The proprietor's old dad was there (everyone calls him Dennis the Menace, but not to his face) and he sarkily said, "Dew yew reckon thass a bit chilly terday eh? Well, thass a snoooflake telling yer ter moind the oice!"
Cheeky bugger. I can tell if it's icy without my car displaying a lit-up snowflake.