New color scheme features a balanced mix of red and silver. The 2010 R15 TDI will makes its racing debut at the Le Castellet 8 Hours race on April 11.

Audi has unveiled its latest design for the R15 TDI Le Mans racer.

The R15 is the successor to Audi's Le Mans-winning R10 and now infamous diesel race car. The new design features a lot more red in a now balanced mix of red and silver.

"We wanted to add a dash of surprise when the Audi leaves the pits at Le Mans...and with a little rock 'n' roll for good measure," said Audi Design Team members Markus Auerbach and Tobias Drews.

The R15 TDI was first tested in early March at Audi's own track in Neustadt. Subsequent testing took place in Florida at Sebring where the R15 ran a five-day, 5500 km marathon with no major technical issues arising.

Audi Sport Team Joest will premiere the R15 TDI, chassis number 202, at the Le Castellet 8 Hours race which takes place on April 11. The car will also run in the free practices prior to the race on Friday April 9 and Saturday April 10.

Gallery: Audi R15 TDI Design for 2010 Revealed