Jan.15 (GMM) BMW-Sauber launched its 2008 campaign on Monday without naming an official 2008 test driver to replace Timo Glock, who has switched to race for Toyota this year.

Moreover, team boss Mario Theissen revealed at the Munich event that a decision will probably not be taken this month, even though the Estonian 23-year-old Marko Asmer is being tipped to get the nod.

Theissen confirmed that Asmer, the reigning British F3 champion, will get another run for the team at the Valencia test this week.

Spanish GP2 race winner Javier Villa tested alongside Asmer before Christmas.

"We will have Marko in the car again this week," Theissen told reporters in Munich, where the Swiss based team's 2008 car, the F1.08, was showed to the press.

"Currently there is no idea about another driver, but I wouldn't rule it out," the German chief added.