ANOTHER BLONDE ONE
A Rich Blonde Buys the New Automatic Mercedes sports car. She drives the car perfectly well during the day, but at night, the car just won't move at all.
After trying to drive the car at night for a week (without any luck), she furiously calls the Mercedes dealers and they send out a technician to her.
The technician examines the car and finds nothing wrong with it. So he turns to the Blonde and asks: Maam, are you sure you are using the right gears?
Full of anger, the Blonde replies: You fool, you Idiot, how on earth can you could ask such a question? I'm not stupid. Of course I am using the right gears; I use D for the Day and N for the Night...