What is the most reliable (best) car to drive on a month road trip in Europe?

I am planning a trip around the coast of France, Portugal, Spain and Italy and wanted to see what the best and most reliable car would to do the job of transporting me and my girlfriend around on this trip.

The trip will be about a month or a month and a half, Economy would play a big part with the choice of car.

The most reliable makes, according to the 2006/2007 Which? car guide are:

Honda: 85%
Toyota: 84%
Lexus: 83%
Hyundai, Mazda, Mitsubishi, Subaru, Suzuki: all on 81%

BMW have average reliability at 76% ... other makes that are traditionally seen as reliable also aren't... VW is average at 75%, Mercedes-Benz is below average at 71%

Edit: Audi are also below average at 74%

BMW parts are available throughout Europe and besides they rarely break down anyway .
i heard megannes wer quite reliable
an Audi.very reliable, economical,and you'll look good in one.
Has to be a Toyota Corolla. Voted best all round for a number of years now.
You want a reliable car,fairly economical,and comfortable for a long drive,then i would recommend the ford Mondeo,never let me down,and i have done loads of trips across Europe in mine.
I suppose it depends on the age of the car as well as the make.
Are you looking to buy a new car, or just something cheap to get by?

Have you thought about hiring a car instead? I know people who've done that before. They were covered for breakdown etc too. It would probably work out the same cost as buying an older car.

Have fun!