Yes, you can—thanks to a new overhaul of Europe's laws regulating how new cars are sold and serviced. Even supermarkets can now sell cars, and dealers can show VWs and Peugeots side by side in the same showroom. That means you can compare different makes and models—and spend less. German online retailer Quelle recently offered a $30,000 Ford Galaxy for $25,000. The law may have an even bigger impact on service. If a mechanic meets certain requirements, he'll be able to get the kind of manufacturer support previously available only to dealers. In time, that should boost quality, increase competition and bring down service charges.