Even so, between them the two drivers had completed 89 laps of the circuit and been able to complete almost all of their planned programme for the day, so Brawn was pleased with how things had gone despite the last minute stumble.
"Overall it was a very reasonable first day and we were able to get a good picture of the tyres and the balance of the car," he said. "There will be the inevitable late night in the engineering office as we look over today's data and work out how to optimise the car for tomorrow."
"It was a useful and busy test day for the team," concurred Wolff. "We completed most of our programme on a range of fuel loads and collected our first impressions of the tyre behaviour here in Melbourne.
"It was a solid start to the weekend and another milestone passed for us," he added. "Now we need to continue improving the car overnight and see what tomorrow brings in qualifying."