Toto Wolff admits it is concerning that Mercedes has had a bad run of reliability at this stage of the season.

Nico Rosberg and Lewis Hamilton both hit trouble in the Canadian Grand Prix - with Hamilton retiring and Rosberg limping home in second place - while the two cars also had to manage problems to the end of the race in Austria a fortnight ago. Following those issues, Rosberg then retired from the lead of the British Grand Prix with a gearbox problem and asked if there was any concern following such a run, Wolff replied: "Yes, lots of concerns.

"The base was really good. We understand much better what happened with our cooling issues but then having a gearbox failure is a bit of a hit because you wouldn't expect in 2014 to have a DNF because of a gearbox breaking down. We have to analyse why and we have to look at the quality aspects of the way we look at things. You can have such a DNF once but not twice."

However, Wolff was encouraged to see Mercedes displaying such dominant pace once again having been challenged so closely by Williams in Austria.

"We knew that Silverstone was going to be good for our car, but we must say we are all surprised how the pace was at the beginning of the race. We were lapping in the 1m38s and the next best was Bottas in the high 1m40s and the rest were in 1m41s. That was better than we anticipated and now we have to try to have the same in Hockenheim. That's going to be a bit more difficult again in terms of heat management."


Join the conversation - Add your comment

Please login or register to add your comment