You have got to be KIDDING me. !!!
Has everyone gotten so STUPID & lazy that they can't do even the tiniest of maintenance procedures.
OPEN the Freaking hood....LOOK around....check things over. There is always a fluid level full / empty line on anything that holds fluids that may get low.
It's a sad day when people are so dumb that they need a light / beeper, etc to tell them anything.
God forbid you ever have a flat tire.....I suppose you will need a warning light to tell you it's flat, instead of JUST LOOKING AT IT!
(sorry for going off, but this is really sad that you can't be expected to actually LOOK at something to figure it out)