BERLIN (Reuters) - Audi <VOWG_p.DE> sold 2.3 percent more cars in July on growing demand for the redesigned top-selling A4 saloon, though kept trailing behind German luxury rivals BMW <BMWG.DE> and Mercedes-Benz <DAIGn.DE>.

Audi's global sales increased to 149,400 cars and sport-utility vehicles from 146,073 a year earlier, the Ingolstadt-based carmaker said on Thursday, with its year-to-date deliveries up 5.2 percent to 1.10 million cars.

Daimler's Mercedes-Benz last week posted a 9.4 percent increase in sales to 163,770 cars, its best-ever July result, compared with a 4 percent gain at BMW's core brand to 153,392.

After seven months, Mercedes-Benz is on course to become the world's biggest luxury carmaker by sales, replacing BMW which has kept the lead since 2005.

(Reporting by Andreas Cremer; Editing by Maria Sheahan)