An ergonomic auto emergency tool for alternatively functioning as a flashlight, an illuminating distress signal, a sonic alarm, a tire depth gauge, a tire air pressure gauge, a seat belt cutter and a motor vehicle window glass breaker. The auto emergency tool includes a main portion and a projecting portion extending from a joining portion and being integral with the main portion, and defining a seat belt-receiving notch therebetween. A knife blade extends across the notch proximate the joining portion. An inner main portion-facing upper surface of the projecting portion is configured to facilitate the movement of the tool towards and through a seat belt, and the bottom outer surface of the projecting portion is curved for both easy handling and for enabling a firm grip when the tool is used to break window glass. The window-breaking mechanism includes a depressible plunger cover for releasing a spring-loaded impact member. A projecting portion and a main housing portion cooperate to define a seat belt receptacle. A blade cover is insertable into the seat belt receptacle. A blade cover includes a tire tread-depth gauge. The auto emergency tool further has a tire pressure gauge with a digital display. An optional visor clip is also provided for storing the tool on the visor of a motor vehicle. The visor clip has an alternate blade cover for attaching the tool to the visor.