Rosberg sure of reliable Williams

Although both Rosberg and teammate Mark Webber enjoyed a very promising qualifying in Sepang, with third and fourth positions, the Williams duo retired before the halfway point of the race.

Rosberg went out with a blown engine, while Webber suffered a hydraulic failure on lap 15.

The team have worked on solving their problems ahead of the Australian Grand Prix, and Rosberg is confident they will have a trouble-free weekend in Melbourne.

"I am very confident," said Rosberg. "Malaysia was a small thing on the Williams side and a small thing on the Cosworth side. Cosworth have been pushing to the maximum all the time and they are near to be perfect.

"We had three cars running on two weekends and we only had one problem which was in mine towards the end of life.

"They have managed to change that and we have done a test with it and it worked out good, and Williams was able to change their thing quickly. It was only a small thing that could be changed easily on the hydraulics, so I have to be very confident and I am very confident."

Rosberg also believes Williams will keep their momentum going and reckons they will be fighting at the sharp end of the field once again.

"I think we will continue the way we have been going," he said. The top end of the grid for sure, somewhere around there and try and get some good points. The temperatures here won't help us but we have had some good tests to improve that, so that shouldn't slow us down too much.

"I just look forward to try and finish the race this time for both cars and try and get some good points."