Mercedes DTM test for Coulthard 25 January, 2010 David Coulthard Jan.25 (GMM) David Coulthard has lined up a day of testing at the wheel of a DTM car with Mercedes-Benz. Sebastian Vettel took over Scottish veteran’s Red Bull race seat last season, but he stayed with the energy drink outfit as a consultant and reserve driver. Coulthard, 38, has also renewed his TV commentary deal with the BBC for 2010, but recent rumours have linked him with a return to racing in the German touring car series. “The guys at Mercedes, with whom I have long been friends, have organised for me a day of (DTM) testing,” he said from the world cup ski races at Kitzbuhel in Austria. Coulthard spent nine seasons with works Mercedes power at McLaren between 1996 and 2004.