(http://media.il.edmunds-media.com/mercedes-benz/ns/mercedes-benz_ns_20211_196.jpg) Four more Formula 1 teams debuted their 2011 cars Tuesday in Spain.
Source: More New F1 Cars Unveiled, as Vettel Paces Practice (http://www.insideline.com:80/mercedes-benz/more-new-f1-cars-unveiled-as-vettel-paces-practice.html)