Nick Heidfeld got his first taste of the new BMW Sauber F1.09 on Friday, when he took over from Robert Kubica in testing at Valencia.
The German, whose teammate had driven the car during the shakedown and for the last two days, managed 92 laps with the new challenger at the Spanish track.
The team, however, were forced to alter their programme for the day due to the gusty winds, and Heidfeld focused mainly on reliability work.
"Finally I could drive the F1.09 for the very first time," Heidfeld. "We still have a lot of work to do, but we are making progress with each kilometre and the reliability is already there. "Overall the F1.09 handles quite differently to last year?s car.
"Fortunately I managed to work on the set-up in the afternoon. The most important result after my first day of testing is that the car reacts as intended to set-up changes."
The team continue working at Valencia tomorrow.