bmw cars have this system, just a sensor and an idiot light; sounds like a great system right?
wrong
one of my coworkers had (lol, foreshadowing) a nice 3 series BMW, and the sensor failed, it was low on oil, but no one could check because there is no dipstick to look at
the car threw a rod through the side of the block on the highway at 100 km/h
BMW blamed the owner for "owner negligence" and voided the warranty
nice