On a side note, if you are travelling in Italy never leave anything valuable, or anything that it looks like it could contain something valuable, in plain view in a vehicle.
A few years ago I was on holiday in Italy and someone broke in to my car and stole a suitcase which contained my laptop, passport and camera. Earlier this year I was living in Rome for a few months and the amount of cars with smashed windows I saw (to grab whatever was left on the seat) was staggering.
Even if you have insurance, it may not cover theft from an unattended motor vehicle (at least mine didn't).