I'm having the same issue. We're planning to arrive in Milan and then spend 10 days driving through northern Italy and Tuscany in Spring 2013. I'm the navigator and my wife is the driver. Although we can both drive a stick, it's been a long time and we just don't want to have to relearn how to drive a manual in a foreign country. This vacation is for fun - coaxing my wife to drive a stick could quickly make it non-fun. So I'll pay the extra money for an automatic.
I've come across lots of suggestions on the web for consolidators. In no special order:
arguscarrentals.com
www.autoeurope.com
www.kemwel.com
www.novacarhire.com
www.economycarrentals.com
www.europebycar.com
www.autoeurope.eu
Autoeurope.it
Here's a comment I came across somewhere which I saved:
Go to the autoeurope site, but change the home country around to different countries. Each time it will give you different choices. If you can use the Italian home page (it is in Italian) you might get the best choices.
When it is time to book, the site allows you to put in your actual home country.
Try the United Kingdom site, Ireland, Canada, etc. It works! We did this when we went to Spain and got a Mercedes A class automatic that was perfect and not listed as available on the US site.
After quite a few hours of frustration,
here is what I've done so far. The following comments that I found somewhere on the web were helpful:
Each year when I go to Europe, I need to get a rental car, but an automatic. Obviously this comes at a premium. I usually find a decent price, and it's usually not the same company consistently. This year, for Italy, I went through https://www.hertz.it and got the best rate.
Hertz: it is cheaper if you select Italy as your country (I saw prices for as little as 178€ per week). If you select another country in Europe the prices will be higher (UK is higher than Spain/France).
At Hertz.it, there was a dropdown to select English at the top of the page. (You don't really need to do it in English because all the boxes you fill in are the same no matter what language you use, so it's pretty obvious how to fill in the page in Italian. If I recall, however, the rates were the same whether I chose Italian or English.) Also, you will notice that there is a place to put in discount codes. I am a AAA member, so I searched the web and found the CDP code for AAA for my state. (That AAA code lowered the price 15%.) Rates in Italy are high I think because they include insurance - I didn't see a way to decline it. But the hertz.it site did show several different automatics and the prices were the best that I've found so far. So I've reserved a vehicle. The price is quite steep by US standards. I'll probably revisit this and do another search of the various sites to see if I can get something cheaper as we get closer to our trip. I also listed this rental on autoslash.com, but haven't heard anything from autoslash so far.
I recently signed up for the American Express Car Rental insurance program.
https://www295.americanexpress.com/premium/car-rental-insurance-mvt/home.do
We're going to Spain this Fall, and we do have (at least, until I cancel it) an AmEx Platinum card (no foreign transaction fees). So this will allow me to pay for a car rental in southern Spain with the AmEx card, decline the CDW, but I'll have primary insurance on the rental via the AmEx program for only about $18 for the entire rental period. However, Italy is one of the countries that is excluded from the AmEx insurance program.
Would appreciate a PM if you find some other and better site for car rental in Italy if you're searching for an automatic.