My father always told me to watch our for 'dummy' lights on my dashboard. You know, the light that comes on when you forget to disengage your emergency brake.A lot of cars will tell you when it's time to have your engine serviced or even if you're due for an oil change, but mine basically tells me I'm an idiot. Your car has a low fuel light, right? Well, after my car (a 2008 Mercedes Benz C300) gives me the low fuel light, it takes it one step further. It has the ultimate 'dummy' light. Don't laugh too hard!