Ross Brawn says it's too early to predict repeat wins for Mercedes

Rosberg was in a class of his own in Shanghai, as he finished well clear of his opposition for his maiden Formula 1 win.

But despite the performance, Mercedes team principal Brawn thinks the uncertainty caused by tyre characteristics this year means he has to be cautious about his outfit's chances going forward.

When asked by AUTOSPORT if he felt the Mercedes W03 had the speed to produce a series of wins in 2012, Brawn said: "It is so difficult to judge because of the sensitivity of the tyres. Did everyone else get it wrong and we got it right? Or did everyone get it right and this is a fair measure of where we are? I don't know.

"The fact that we have been close in qualifying in the first two races gives me encouragement, but it was just a perfect race for us here and I expect it wasn't for others. We have to turn as many races as we can into perfect races."

Mercedes-Benz motorsport boss Norbert Haug added that the team would maintain a realistic approach to the remainder of the season, as he was not sure just how good its car was.

"I will not make an answer that is unrealistic," he said about the possibility of Mercedes adding further wins this season. "We are not favourites but we are not nowhere. Not lots of people would have had us do this after the first two races.

"We have our own expectations, and I think the team can handle that. They won before and hopefully they will win in the future again."