Sebastian Vettel and Mark Webber put Red Bull in a solid position after the first day of running in Abu Dhabi despite the latter losing track time in the second free practice session at Yas Marina.
Webber saw his running limited to 21 laps in the second session when he was forced to curtail his programme due to a KERS issue on his car.
It meant he finished up with the fourth quickest time and although he admitted it wasn't ideal to miss out on track time, he insisted it wasn't a major issue for the remainder of the weekend.
“We had a KERS issue, which wasn't the same as last week,” he said, referring to the issue he faced during the Indian Grand Prix. “It never helps to miss some running on the track during practice, but it's not a big deal.
“The track will move around a little bit from where it is now, but not a huge amount; it's in pretty good shape straightaway. We'll get it fixed tonight and come back tomorrow.”
Team-mate Vettel was quickest after outpacing Lewis Hamilton in the second session, but the defending champion said Red Bull needed to keep pushing to secure the best qualifying result possible.
“I think we can be happy with today,” he said. “Overall we got a good lap on the soft tyres, but in general pace the McLaren's were quick and seem competitive, so they're the ones we need to look out for and beat.
“We need to improve the car overnight to qualify as high as we can tomorrow.”