DaimlerChrysler's ( DCX) second-quarter earnings rose fourfold from a year ago, thanks to improved performance at its Chrysler Group segment. The automaker earned $675 million, or 67 cents a share, in the three months ended June 30, up from $133 million, or 13 cents a share, last year. Revenue rose 9% to $5.2 billion. The top and bottom lines both eclipsed analyst estimates in the most recent quarter. Second-quarter unit sales rose 10% from a year ago 1.3 million vehicles. At Chrysler, worldwide retail sales rose 3% to 759,800, reflecting strong sales of new products including the Chrysler 300, the Dodge Magnum and the Dodge Durango. The segment's revenue jumped 18% from a year ago when counted in dollars. For the full year, DaimlerChrysler expects operating earnings to be up significantly from 2003.