This is more of a tip than a question. I just want first-time car rental travelers to be aware that dropping off your car in Europe can be much more confusing that picking it up. Even if you have GPS, it's a good idea to call ahead for directions or use a mapping program with a street view function to actually took at the drop-off location. Signage is often terrible for drop-off locations, at least in Italy and France. Here are three examples:
In Florence, the drop-off location for rental cars at the airport is so confusing that the clerk at the airport terminal desk told me to wait for the shuttle and then follow it to the lot.
At Charles de Gaulle airport, I was leaving from Terminal 2B, but the drop-off for rental cars was at Terminals 2C/2D. There were NO SIGNS on the ramp to Terminals 2A/2B that the rental drop-off was later. I went around in circles until I asked someone where the drop-off lot was.
At the Gare de Lyon train station in Paris, the drop-off lot for Europcar and Hertz is in a parking garage near the train station. The only sign noting this is a name plate on the SIDE of the garage entrance--impossible to see as you are driving past in crazy Paris traffic. And right next to this garage entrance is the entrance to a separate parking garage. Fortunately I had looked up the address ahead in Google Street view and even zoomed on the image to locate the name plate.
So let this be a warning if you are renting a car to be extra clear on where to drop it off--even if you are doing it at an airport.