ZF Sales Increase by 7 Percent in 2005Investments in new products pay off2005/12/15 -- Friedrichshafen/Stuttgart. Automotive industry supplier ZF Friedrichshafen AG achieves a 7-percent increase in 2005 revenues to ?10.7 billion. ZF divisions managed to increase sales thanks to the success of innovative driveline and chassis technology products and positive developments in the markets for commercial vehicles and construction machinery.