Updated from 12:16 p.m. ESTFord ( F) posted its first monthly car sales increase in a year on Tuesday, buoyed by models including the Mustang, while DaimlerChrysler ( DCX) saw U.S. results surge in December. Sales at GM ( GM) fell, however. Ford's overall U.S. car and truck sales were 294,270 in December, up 0.7% from 292,209 a year ago. Truck sales fell 0.2% from a year ago to 211,070, while car sales rose 3% to 83,200. Analysts had been expecting a roughly 4% decline in Ford's overall December sales. Among brands, cars and trucks sold under the Ford label rose 2% from last year, while Volvo was up 4% and Land Rover was up 49%. For the full year, the company's U.S. sales totaled 3.33 million, down 4%. GM said vehicle sales totaled 437,161 in December, down 2.4% from a year ago. Truck sales were 273,867, down from 278,406, while car sales were 163,294, down from 169,494. For the year, overall vehicle sales were about 100,000 lower than in 2003 at 4.7 million. DaimlerChrysler's Chrysler Group said overall December sales were 199,280 compared with 182,831 a year ago. For 2004, sales rose by 100,000 vehicles to 2.2 million.