Newey hopeful of improved reliability

David Coulthard's fifth place finish in Spain appeared to point towards the team finally delivering on their potential, but further problems in Monaco have suggested that there is still plenty of work to do.

But Newey believes that progress has been made ahead of this weekend's Canadian Grand Prix.

"We are trying to get on top of our reliability problems that centred on gearbox electrics and hydraulics," he said. "I think we have moved forward on that front."

Red Bull's RB3 will run with the team's low-downforce configuration rear wing in Montreal for the first time, with rival teams likely to keep a close eye on its behaviour following the flexi-wing controversy that erupted after the Spanish Grand Prix.

In the wake of the Barcelona issue, where on-board video footage showed Coulthard's rear wing flexing, the FIA has introduced more stringent tests from this weekend - something that Newey says his team will have to take into account.

"We now have to comply with a new Deflection Test introduced by the FIA to ascertain if your rear wing is flexing illegally," he said.

"We tested our Montreal configuration on the last two days of a Ricard test before Monaco. The rear wing we ran at this test was a cut-down version of our Melbourne wing, so Montreal will be the first outing for our definitive low downforce rear wing."