Under what circumstance may a driver use hazard warning flashers (luces de advertencia de peligro / luces de emergencia) while driving in Chile?

1. To park illegally on a red-painted curb or bus stop
2. When the vehicle is disabled, stopped due to emergency, or when suddenly forced to slow down dramatically to warn trailing vehicles of a major obstruction ahead
3. To signal a left turn when turn indicators are broken
4. To drive faster through urban traffic jams