Coulthard: No worries over Red Bull safety

Coulthard has seen the suspension on his car collapse twice this year - after a collision with Felipe Massa in Australia and after hitting a kerb in practice for the Malaysian Grand Prix.

Those incidents prompted an FIA investigation into the strength of the suspension at Sepang last weekend, after which the car was given the all clear.

But despite the events, Coulthard has said he is not worried about the design of the RB4, and that he is not surprised the suspension broke after the impact with the kerb at Sepang.

"The suspension saw twice the normal loads it would see at the fastest corner," explained Coulthard about his accident in Malaysia. "Although it looked fairly spectacular and many were wondering why it fell to pieces, you never see those loads unless you hit something.

"Keep things within their design parameters and they'll operate normally. Take them outside and you tend to get catastrophic failures."

Although mechanical failures in cars are always likely to affect a driver's confidence in a car, Coulthard has said he has no doubts about the safety of his car.

"I've got no confidence problems. I think it's a racing driver thing: we're confident/competitive/stupid enough to think it will never happen to us.

"The Toyota (of Timo Glock) fell to pieces fairly spectacularly after it had its incident in Melbourne, so carbon does tend to disintegrate.

"Look at (Robert) Kubica's accident in Canada. It was remarkable he emerged without any serious injury but I remind you: his feet were hanging out the front of his car and had he had a secondary impact with the concrete wall he would probably have broken his ankles.

"I remember Johnny Herbert's accident back at Brands Hatch in 1988 - there's a large element of luck in any accident and there's no question the cars are considerably stronger than they were several years ago."