The Williams Formula One team pulled up at Circuito de Jerez in Jerez de la Frontera, Spain, on Monday to find the Red Bull team also looking to work a few laps even before course managers were ready to sell spectators tickets -- at five Euros a piece.
The bulk of teams -- save Toyota and Ferrari, who Monday concluded a week's test in Bahrain -- are scheduled to begin testing Tuesday at the 4.428-kilometer (2.75-mile) course.
Williams drivers Nico Rosberg and Kazuki Nakajima set about mechanical set-up work and long runs for reliability to advance system development on Williams's interim FW29Bs. Technical director Sam Michael said a revision to the front wing mounting system was made.
"We had no major issues, and both Nico and Kazuki will continue with the program (Tuesday)," he said.
Mild weather and air temperatures of about 60 degrees Fahrenheit kept drivers cool and times bundled. Nakajima drove to a quick lap of 1 minute, 20.831 seconds Rosberg recorded a quick lap of 1:20.945 seconds.
Williams recorded times of 1:20.645 for David Coulthard and 1:20.798 for Mark Webber of Red Bull. Test times are unofficial.
Williams plans to continue its display of selected liveries to celebrate 30 years participation in Formula One when the FW30s arrive this week.