Circuit length: 4.655 km
It was a case of 01 + 02 = 2 today, as, with the arrival of chassis 02, the team ran two RB4 cars for the first time. David Coulthard had the job of giving the latest chassis its shakedown, before moving on to general set-up work, which was also the main item on the agenda for Mark Webber. Running a different Bridgestone tyre to the last test, conditions were complicated by extremely cold weather at the Circuit de Catalunya.
The day was generally trouble free and David and Mark continue testing here tomorrow.