Five Scotsmen in an Audi Quattro arrived at an Irish border checkpoint.  Tommy the officer stops them and tells them: "It is illegal to put 5 people in a Quattro, Quattro means four."

"Quattro is just the name of the car," the Scotsmen retorts in disbelief. "Look at the papers: this car is designed to carry five persons."

"You can't pull that one on me," replies Tommy "Quattro means four.  You have five people in your car and you are therefore breaking the law."

The Scotsmen replies angrily, "You idiot! Call your supervisor over. I want to speak to someone with more intelligence!"

"Sorry," responds Tommy, "Murphy is busy with 2 guys in a Fiat Uno."