Whats wrong?: In certain cases the engine coolant temperature sensor may be cracked, tThis cracking could cause the engine coolant temperature warning light to come on inadvertently and in rare cases, ...

These symbols, often called "idiot lights," are aimed at being easy to understand. But for many drivers, young and old alike, it's not that easy.

I bought a new Mercedes- Benz A180 in 2014 and had no problems for 12 months until the first service when a message appeared, "Add coolant, if on a slope". On a longer drive the temperature gauge ...