A rich blonde

[retired2]

A rich blonde buys a new automatic Jaguar XKR Sport.

The car drives perfectly during the day, but
at night, the car just won't move at all, the engine just revs.

After trying to drive the car at night for a week (but
without any luck), she furiously calls the Jaguar 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:
"Ma’am, are you sure you are using the right gears?"

Full of anger, the blonde replies:
"You fool, you idiot, how on earth you could ask such a question?
I'm not stupid.
Of course I am using the right gears;
I use D during the day and N during the night.