Lexus wasn't the first Japanese automaker to launch a premium brand in North America (that title belongs to Acura) but it has been the most successful. Last week on the 20th anniversary of the launch of the original LS400 at the Detroit Auto Show, Lexus did debut a true first. The new HS250h is the world's first dedicated luxury hybrid which means it's only available with combined gas and electric drive. There is no non-hybrid version of the HS250h which is derived from the Prius.
