A natural blonde purchases a new Mercedes, but a few days later she calls the dealership complaining.
For some reason, she can't get it to move at night. She's fine driving in the daytime, but at night, the car just won't go.
The Mercedes service rep scheduled an appointment the next day, and she was able to drive it there with no problems.
After an entire day running diagnostics and tests, the mechanics were stumped. Everything checked out.
The service rep then called to ask, "Are you sure you're putting it in the right gear? Maybe you're not able to see the console at night?"
To which she replied, "No, i can see it perfectly. i put it in "D" for Day and 'N" for Night ...."