Mark Webber admits his final day of pre-season testing was blighted by "lots of small things" that cost him track time.
The Aussie was in action on Day Three at the Circuit de Catalunya but while Red Bull will remain at the track for a further day, Webber will hand the RB9 over to his team-mate Sebastian Vettel.
As such Saturday was Webber's last in the car before heading to Melbourne for the season-opening Australian Grand Prix.
The day, though, did not go according to plan as he completed just 59 laps and finished over two seconds off the pace.
"I'd have liked to have been out there so there was problems with the car, yeah," Webber told ESPNF1.
"Just lots of small things which stopped me from running.
"You need to make sure everything's right; there's no point running when the thing's not in the window if you like, so we had to wait a little bit longer than we would have liked."
But despite not getting the laps he wanted, Webber reckons Red Bull's pre-season has gone "pretty well.
"It's always hard to know who's doing what at this time of year but we're focusing of course on ourselves and working hard on that.
"There's too much media and not enough racing at the moment so we need to just get down to Melbourne and stop talking about it and just get on with it.
"We've got work to do; there are still for sure some weaknesses to iron out and keep the strengths."
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