The Italian Customs agent stops them and tells them: "It's illegal to put 5 people in a Quattro."
"Vot do you mean it's illegal?" asks the German driver.
"Quattro meansa four" replies the Italian official.
"Qvattro is just ze name of ze automobile", the German retorts unbelievingly. "Look at ze papers: zis car is designt to kerry 5 persons."
"You can'ta pull thata one on me!", replies the Italian customs agent. "Quattro meansa four. You hava fiva people ina your car and you are therefore breakinga the law."
The German driver replies angrily, "You idiot! Call your zupervisor ofer hjar - I vant to speak to somevone viz more intelligence!"
"Sorry", responds the Italian official, "he can'ta come. He'sa very busy with 3 guys in a Fiat Uno."
uno means one