Mercedes 'calm and concentrated' over Michael Schumacher's reliability issues

Schumacher has scored just two points so far this campaign - having crashed out of one race and suffered mechanical failures at four events.

That run of trouble, which is in contrast to Nico Rosberg's trouble-free campaign, has left Mercedes determined to get to the bottom of exactly what has gone wrong - and the German car manufacturer has admitted that it has not done a good enough job.

Mercedes motorsport boss Norbert Haug said: "We have been through every detail and this is not the standard of the team, but sometimes you have such a period and you need to be strong and concentrated and focused. I am sure it will change.

"There are no reasons; it is just something that should not happen. It is rare that one car does each and very race lap after seven races and the other car hits trouble. We know that and we have to and will fix it, but it is a calm and concentrated approach."

Haug said the team was not going to rush into making procedural changes just for the sake of it.

"People are doing their job and if you have a weaker period you need to systematically explore it and understand the reasons for it," he said. "There are not specific reasons, but it is the results that count. They are not as we want them to be but we have to have a constructive approach to it."

While Schumacher has scored two points so far this year, his team-mate Rosberg is currently fifth in the drivers' championship with 67 points.